exceptionfactory commented on a change in pull request #5326: URL: https://github.com/apache/nifi/pull/5326#discussion_r696113912
########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { + return; + } + + try (InputStream in = session.read(flowFile)) { + // Read in flowFile inputstream, and validate against schema + JsonNode node = mapper.readTree(in); Review comment: In light of reading the entire FlowFile into memory, recommend add the `SystemResourceConsideration(resource = SystemResource.MEMORY)` annotation to the processor class. ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { + return; + } + + try (InputStream in = session.read(flowFile)) { + // Read in flowFile inputstream, and validate against schema + JsonNode node = mapper.readTree(in); + String schemaText = context.getProperty(SCHEMA_TEXT).evaluateAttributeExpressions().getValue(); + JsonSchemaFactory factory = JsonSchemaFactory.getInstance(schemaVersion); + JsonSchema schema = factory.getSchema(schemaText); + Set<ValidationMessage> errors = schema.validate(node); + + if (errors.size() > 0) { + // Schema checks failed + flowFile = session.putAttribute(flowFile, ERROR_ATTRIBUTE_KEY, errors.toString()); + this.getLogger().info("Found {} to be invalid when validated against schema; routing to 'invalid'", new Object[]{flowFile}); + session.getProvenanceReporter().route(flowFile, REL_INVALID); + session.transfer(flowFile, REL_INVALID); + } else { + // Schema check passed + this.getLogger().debug("Successfully validated {} against schema; routing to 'valid'", new Object[]{flowFile}); + session.getProvenanceReporter().route(flowFile, REL_VALID); + session.transfer(flowFile, REL_VALID); + } + + } catch (IOException ioe) { + // Failed to read flowFile + this.getLogger().error("Failed to process {} due to {}; routing to 'failure'", new Object[]{flowFile, ioe}); Review comment: ```suggestion getLogger().error("Failed to process {}", flowFile, ioe); ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven Review comment: Is there a reason for including this annotation? ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") Review comment: The general convention for property names seems to be lower-case strings. ```suggestion .Builder().name("schema-version") ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { Review comment: ```suggestion if (flowFile == null) { ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { + return; + } + + try (InputStream in = session.read(flowFile)) { + // Read in flowFile inputstream, and validate against schema + JsonNode node = mapper.readTree(in); + String schemaText = context.getProperty(SCHEMA_TEXT).evaluateAttributeExpressions().getValue(); + JsonSchemaFactory factory = JsonSchemaFactory.getInstance(schemaVersion); + JsonSchema schema = factory.getSchema(schemaText); + Set<ValidationMessage> errors = schema.validate(node); + + if (errors.size() > 0) { + // Schema checks failed + flowFile = session.putAttribute(flowFile, ERROR_ATTRIBUTE_KEY, errors.toString()); + this.getLogger().info("Found {} to be invalid when validated against schema; routing to 'invalid'", new Object[]{flowFile}); + session.getProvenanceReporter().route(flowFile, REL_INVALID); + session.transfer(flowFile, REL_INVALID); + } else { + // Schema check passed + this.getLogger().debug("Successfully validated {} against schema; routing to 'valid'", new Object[]{flowFile}); Review comment: ```suggestion getLogger().debug("Successfully validated {} against schema", flowFile); ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) Review comment: What do you think about supporting Expression Language for this property? ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/pom.xml ########## @@ -371,6 +371,11 @@ <artifactId>nifi-database-utils</artifactId> <version>1.15.0-SNAPSHOT</version> </dependency> + <dependency> + <groupId>com.networknt</groupId> + <artifactId>json-schema-validator</artifactId> + <version>1.0.38</version> Review comment: The current version of `json-schema-validator` is 1.0.58, can this be upgraded to the latest version? The license is ASL 2.0, which is great, but the `NOTICE` file should be updated to include a reference to this library. ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") Review comment: ```suggestion .Builder().name("schema-text") ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { + return; + } + + try (InputStream in = session.read(flowFile)) { + // Read in flowFile inputstream, and validate against schema + JsonNode node = mapper.readTree(in); + String schemaText = context.getProperty(SCHEMA_TEXT).evaluateAttributeExpressions().getValue(); + JsonSchemaFactory factory = JsonSchemaFactory.getInstance(schemaVersion); + JsonSchema schema = factory.getSchema(schemaText); + Set<ValidationMessage> errors = schema.validate(node); + + if (errors.size() > 0) { + // Schema checks failed + flowFile = session.putAttribute(flowFile, ERROR_ATTRIBUTE_KEY, errors.toString()); + this.getLogger().info("Found {} to be invalid when validated against schema; routing to 'invalid'", new Object[]{flowFile}); Review comment: Recommend changing this to a debug level message to avoid writing a message for every FlowFile processed. In addition, log arguments no longer need the wrapping `Object[]`. ```suggestion getLogger().debug("Found {} to be invalid when validated against schema", flowFile); ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { + return; + } + + try (InputStream in = session.read(flowFile)) { + // Read in flowFile inputstream, and validate against schema + JsonNode node = mapper.readTree(in); + String schemaText = context.getProperty(SCHEMA_TEXT).evaluateAttributeExpressions().getValue(); + JsonSchemaFactory factory = JsonSchemaFactory.getInstance(schemaVersion); + JsonSchema schema = factory.getSchema(schemaText); + Set<ValidationMessage> errors = schema.validate(node); Review comment: It looks like these variables could be marked as `final`. ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; Review comment: Recommend adjusting the name to avoid using the Processor name: ```suggestion public static final String ERROR_ATTRIBUTE_KEY = "json.schema.validation.errors"; ``` ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) + .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) + .build(); + + public static final Relationship REL_VALID = new Relationship.Builder() + .name("valid") + .description("FlowFiles that are successfully validated against the schema are routed to this relationship") + .build(); + + public static final Relationship REL_INVALID = new Relationship.Builder() + .name("invalid") + .description("FlowFiles that are not valid according to the specified schema are routed to this relationship") + .build(); + + public static final Relationship REL_FAILURE = new Relationship.Builder() + .name("failure") + .description("FlowFiles that cannot be read as JSON are routed to this relationship") + .build(); + + private List<PropertyDescriptor> descriptors; + + private Set<Relationship> relationships; + + private List<AllowableValue> allowableValues; + + @Override + protected void init(final ProcessorInitializationContext context) { + final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>(); + descriptors.add(SCHEMA_TEXT); + descriptors.add(SCHEMA_VERSION); + this.descriptors = Collections.unmodifiableList(descriptors); + + final Set<Relationship> relationships = new HashSet<Relationship>(); + relationships.add(REL_VALID); + relationships.add(REL_INVALID); + relationships.add(REL_FAILURE); + this.relationships = Collections.unmodifiableSet(relationships); + + final List<AllowableValue> allowableValues = new ArrayList<AllowableValue>(); + allowableValues.add(SCHEMA_VERSION_4); + allowableValues.add(SCHEMA_VERSION_6); + allowableValues.add(SCHEMA_VERSION_7); + allowableValues.add(SCHEMA_VERSION_V201909); + this.allowableValues = Collections.unmodifiableList(allowableValues); + + } + + @Override + public Set<Relationship> getRelationships() { + return this.relationships; + } + + @Override + public final List<PropertyDescriptor> getSupportedPropertyDescriptors() { + return descriptors; + } + + private ObjectMapper mapper = new ObjectMapper(); + private VersionFlag schemaVersion; + + @OnScheduled + public void onScheduled(final ProcessContext context) { + // Set JSON schema version to use from processor property + this.schemaVersion = VersionFlag.V201909; + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_4.getValue()) { + this.schemaVersion = VersionFlag.V4; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_6.getValue()) { + this.schemaVersion = VersionFlag.V6; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_7.getValue()) { + this.schemaVersion = VersionFlag.V7; + } + if (context.getProperty(SCHEMA_VERSION).getValue() == SCHEMA_VERSION_V201909.getValue()) { + this.schemaVersion = VersionFlag.V201909; + } + } + + + @Override + public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException { + FlowFile flowFile = session.get(); + if ( flowFile == null ) { + return; + } + + try (InputStream in = session.read(flowFile)) { + // Read in flowFile inputstream, and validate against schema + JsonNode node = mapper.readTree(in); + String schemaText = context.getProperty(SCHEMA_TEXT).evaluateAttributeExpressions().getValue(); + JsonSchemaFactory factory = JsonSchemaFactory.getInstance(schemaVersion); + JsonSchema schema = factory.getSchema(schemaText); + Set<ValidationMessage> errors = schema.validate(node); + + if (errors.size() > 0) { + // Schema checks failed + flowFile = session.putAttribute(flowFile, ERROR_ATTRIBUTE_KEY, errors.toString()); + this.getLogger().info("Found {} to be invalid when validated against schema; routing to 'invalid'", new Object[]{flowFile}); + session.getProvenanceReporter().route(flowFile, REL_INVALID); Review comment: Is this call to the Provenance Reporter necessary? ########## File path: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ValidateJson.java ########## @@ -0,0 +1,203 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.nifi.processors.standard; + +import org.apache.nifi.components.AllowableValue; +import org.apache.nifi.components.PropertyDescriptor; +import org.apache.nifi.expression.ExpressionLanguageScope; +import org.apache.nifi.flowfile.FlowFile; +import org.apache.nifi.annotation.behavior.EventDriven; +import org.apache.nifi.annotation.behavior.InputRequirement; +import org.apache.nifi.annotation.behavior.SideEffectFree; +import org.apache.nifi.annotation.behavior.SupportsBatching; +import org.apache.nifi.annotation.behavior.WritesAttribute; +import org.apache.nifi.annotation.behavior.WritesAttributes; +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement; +import org.apache.nifi.annotation.documentation.CapabilityDescription; +import org.apache.nifi.annotation.documentation.Tags; +import org.apache.nifi.annotation.lifecycle.OnScheduled; +import org.apache.nifi.processor.exception.ProcessException; +import org.apache.nifi.processor.AbstractProcessor; +import org.apache.nifi.processor.ProcessContext; +import org.apache.nifi.processor.ProcessSession; +import org.apache.nifi.processor.ProcessorInitializationContext; +import org.apache.nifi.processor.Relationship; +import org.apache.nifi.processor.util.StandardValidators; + +import java.io.IOException; +import java.io.InputStream; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +import com.fasterxml.jackson.databind.JsonNode; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.networknt.schema.JsonSchema; +import com.networknt.schema.JsonSchemaFactory; +import com.networknt.schema.ValidationMessage; +import com.networknt.schema.SpecVersion.VersionFlag; + +@EventDriven +@SideEffectFree +@SupportsBatching +@InputRequirement(Requirement.INPUT_REQUIRED) +@Tags({"JSON", "schema", "validation"}) +@WritesAttributes({ + @WritesAttribute(attribute = "validatejson.invalid.error", description = "If the flow file is routed to the invalid relationship " + + "the attribute will contain the error message resulting from the validation failure.") +}) +@CapabilityDescription("Validates the contents of FlowFiles against a user-specified JSON Schema file") +public class ValidateJson extends AbstractProcessor { + + public static final String ERROR_ATTRIBUTE_KEY = "validatejson.invalid.error"; + + public static final AllowableValue SCHEMA_VERSION_4 = new AllowableValue("V4"); + public static final AllowableValue SCHEMA_VERSION_6 = new AllowableValue("V6"); + public static final AllowableValue SCHEMA_VERSION_7 = new AllowableValue("V7"); + public static final AllowableValue SCHEMA_VERSION_V201909 = new AllowableValue("V201909"); + + public static final PropertyDescriptor SCHEMA_VERSION = new PropertyDescriptor + .Builder().name("SCHEMA_VERSION") + .displayName("Schema Version") + .description("The JSON schema specification") + .required(true) + .allowableValues(SCHEMA_VERSION_4, SCHEMA_VERSION_6, SCHEMA_VERSION_7, SCHEMA_VERSION_V201909) + .defaultValue(SCHEMA_VERSION_V201909.getValue()) + .build(); + + public static final PropertyDescriptor SCHEMA_TEXT = new PropertyDescriptor + .Builder().name("SCHEMA_TEXT") + .displayName("Schema Text") + .description("The text of a JSON schema") + .required(true) + .expressionLanguageSupported(ExpressionLanguageScope.VARIABLE_REGISTRY) Review comment: Is there a reason for supporting only Variable Registry as opposed to supporting FlowFile-based expression language for this property? -- This is an automated message from the Apache Git Service. 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