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https://issues.apache.org/jira/browse/NIFI-2565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15572095#comment-15572095
]
ASF GitHub Bot commented on NIFI-2565:
--------------------------------------
Github user markap14 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1108#discussion_r83227771
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GrokParser.java
---
@@ -0,0 +1,243 @@
+/*
+ * 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 com.fasterxml.jackson.databind.ObjectMapper;
+import oi.thekraken.grok.api.Grok;
+import oi.thekraken.grok.api.Match;
+import oi.thekraken.grok.api.exception.GrokException;
+import org.apache.nifi.annotation.behavior.ReadsAttribute;
+import org.apache.nifi.annotation.behavior.ReadsAttributes;
+import org.apache.nifi.annotation.behavior.WritesAttribute;
+import org.apache.nifi.annotation.behavior.WritesAttributes;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.SeeAlso;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnScheduled;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.flowfile.attributes.CoreAttributes;
+import org.apache.nifi.flowfile.FlowFile;
+
+import org.apache.nifi.processor.AbstractProcessor;
+import org.apache.nifi.processor.DataUnit;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.io.InputStreamCallback;
+import org.apache.nifi.processor.io.StreamCallback;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.stream.io.BufferedOutputStream;
+import org.apache.nifi.stream.io.StreamUtils;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.charset.Charset;
+import java.util.List;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.Set;
+import java.util.HashSet;
+import java.util.ArrayList;
+import java.util.Collections;
+
+
+@Tags({"Grok Processor"})
+@CapabilityDescription("Use Grok expression ,a la logstash, to parse
data.")
+@SeeAlso({})
+@ReadsAttributes({@ReadsAttribute(attribute="", description="")})
+@WritesAttributes({@WritesAttribute(attribute="", description="")})
+public class GrokParser extends AbstractProcessor {
+
+
+ public static final String DESTINATION_ATTRIBUTE =
"flowfile-attribute";
+ public static final String DESTINATION_CONTENT = "flowfile-content";
+ private static final String APPLICATION_JSON = "application/json";
+
+ public static final PropertyDescriptor GROK_EXPRESSION = new
PropertyDescriptor
+ .Builder().name("Grok Expression")
+ .description("Grok expression")
+ .required(true)
+ .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor GROK_PATTERN_FILE = new
PropertyDescriptor
+ .Builder().name("Grok Pattern file")
+ .description("Grok Pattern file definition")
+ .required(false)
+ .addValidator(StandardValidators.FILE_EXISTS_VALIDATOR)
+ .build();
+
+ public static final PropertyDescriptor DESTINATION = new
PropertyDescriptor.Builder()
+ .name("Destination")
+ .description("Control if Grok output value is written as a new
flowfile attribute " +
+ "or written in the flowfile content. Writing to
flowfile content will overwrite any " +
+ "existing flowfile content.")
+ .required(true)
+ .allowableValues(DESTINATION_ATTRIBUTE, DESTINATION_CONTENT)
+ .defaultValue(DESTINATION_ATTRIBUTE)
+ .build();
+
+ public static final PropertyDescriptor CHARACTER_SET = new
PropertyDescriptor
+ .Builder().name("Character Set")
+ .description("The Character Set in which the file is encoded")
+ .required(true)
+ .addValidator(StandardValidators.CHARACTER_SET_VALIDATOR)
+ .defaultValue("UTF-8")
+ .build();
+
+ public static final PropertyDescriptor MAX_BUFFER_SIZE = new
PropertyDescriptor
+ .Builder().name("Maximum Buffer Size")
+ .description("Specifies the maximum amount of data to buffer
(per file) in order to apply the Grok expressions. Files larger than the
specified maximum will not be fully evaluated.")
+ .required(true)
+ .addValidator(StandardValidators.DATA_SIZE_VALIDATOR)
+
.addValidator(StandardValidators.createDataSizeBoundsValidator(0,
Integer.MAX_VALUE))
+ .defaultValue("1 MB")
+ .build();
+
+ public static final Relationship REL_MATCH = new Relationship.Builder()
+ .name("matched")
+ .description("FlowFiles are routed to this relationship when
the Grok Expression is successfully evaluated and the FlowFile is modified as a
result")
+ .build();
+
+ public static final Relationship REL_NO_MATCH = new
Relationship.Builder()
+ .name("unmatched")
+ .description("FlowFiles are routed to this relationship when
no provided Grok Expression matches the content of the FlowFile")
+ .build();
+
+ private List<PropertyDescriptor> descriptors;
+
+ private Set<Relationship> relationships;
+
+ private static final ObjectMapper objectMapper = new ObjectMapper();
+
+ private Grok grok;
--- End diff --
These member variables are not thread-safe. They should be defined inline
where needed, or properly protected via Java's concurrency mechanisms.
> NiFi processor to parse logs using Grok patterns
> ------------------------------------------------
>
> Key: NIFI-2565
> URL: https://issues.apache.org/jira/browse/NIFI-2565
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Andre
> Fix For: 1.1.0
>
>
> Following up on Ryan Ward to create a Grok capable parser
> https://mail-archives.apache.org/mod_mbox/nifi-dev/201606.mbox/%3CCADD=rnPa8nHkJbeM280=PTQ=wurtwhstm5u+7btoo9pcym2...@mail.gmail.com%3E
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