exceptionfactory commented on code in PR #8105:
URL: https://github.com/apache/nifi/pull/8105#discussion_r1669267566
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -85,9 +85,9 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(Validator.VALID)
.build();
-
public static final PropertyDescriptor ROUTING_KEY = new
PropertyDescriptor.Builder()
.name("Routing Key")
+ .displayName("Routing Key")
Review Comment:
```suggestion
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -206,46 +247,94 @@ private byte[] extractMessage(FlowFile flowFile,
ProcessSession session) {
}
- private void updateBuilderFromAttribute(final FlowFile flowFile, final
String attribute, final Consumer<String> updater) {
- final String attributeValue = flowFile.getAttribute(ATTRIBUTES_PREFIX
+ attribute);
+ /**
+ * Reads an attribute from flowFile and pass it to the consumer function
+ *
+ * @param flowFile FlowFile for reading the attribute
+ * @param attributeKey Name of the attribute
+ * @param updater Consumer function which will use the attribute
value
+ */
+ private void readAmqpAttribute(final FlowFile flowFile, final String
attributeKey, final Consumer<String> updater) {
+ final String attributeValue = flowFile.getAttribute(attributeKey);
if (attributeValue == null) {
return;
}
try {
updater.accept(attributeValue);
} catch (final Exception e) {
- getLogger().warn("Failed to update AMQP Message Property {}",
attribute, e);
+ getLogger().warn("Failed to update AMQP Message Property [{}]",
attributeKey, e);
}
}
/**
* Extracts AMQP properties from the {@link FlowFile} attributes.
Attributes
* extracted from {@link FlowFile} are considered candidates for AMQP
- * properties if their names are prefixed with
- * {@link PublishAMQP#ATTRIBUTES_PREFIX} (e.g., amqp$contentType=text/xml).
+ * properties if their names are prefixed with "amq$" (e.g.,
amqp$contentType=text/xml).
*/
- private BasicProperties extractAmqpPropertiesFromFlowFile(FlowFile
flowFile, Character headerSeparator) {
+ private BasicProperties extractAmqpPropertiesFromFlowFile(FlowFile
flowFile, String selectedHeaderSource, String headerSourcePrecedence, Character
separator, Pattern pattern) {
final AMQP.BasicProperties.Builder builder = new
AMQP.BasicProperties.Builder();
- updateBuilderFromAttribute(flowFile, "contentType",
builder::contentType);
- updateBuilderFromAttribute(flowFile, "contentEncoding",
builder::contentEncoding);
- updateBuilderFromAttribute(flowFile, "deliveryMode", mode ->
builder.deliveryMode(Integer.parseInt(mode)));
- updateBuilderFromAttribute(flowFile, "priority", pri ->
builder.priority(Integer.parseInt(pri)));
- updateBuilderFromAttribute(flowFile, "correlationId",
builder::correlationId);
- updateBuilderFromAttribute(flowFile, "replyTo", builder::replyTo);
- updateBuilderFromAttribute(flowFile, "expiration",
builder::expiration);
- updateBuilderFromAttribute(flowFile, "messageId", builder::messageId);
- updateBuilderFromAttribute(flowFile, "timestamp", ts ->
builder.timestamp(new Date(Long.parseLong(ts))));
- updateBuilderFromAttribute(flowFile, "type", builder::type);
- updateBuilderFromAttribute(flowFile, "userId", builder::userId);
- updateBuilderFromAttribute(flowFile, "appId", builder::appId);
- updateBuilderFromAttribute(flowFile, "clusterId", builder::clusterId);
- updateBuilderFromAttribute(flowFile, "headers", headers ->
builder.headers(validateAMQPHeaderProperty(headers, headerSeparator)));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CONTENT_TYPE_ATTRIBUTE, builder::contentType);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CONTENT_ENCODING_ATTRIBUTE,
builder::contentEncoding);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_DELIVERY_MODE_ATTRIBUTE, mode ->
builder.deliveryMode(Integer.parseInt(mode)));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_PRIORITY_ATTRIBUTE, pri ->
builder.priority(Integer.parseInt(pri)));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CORRELATION_ID_ATTRIBUTE, builder::correlationId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_REPLY_TO_ATTRIBUTE, builder::replyTo);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_EXPIRATION_ATTRIBUTE, builder::expiration);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_MESSAGE_ID_ATTRIBUTE, builder::messageId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_TIMESTAMP_ATTRIBUTE, ts -> builder.timestamp(new
Date(Long.parseLong(ts))));
+ readAmqpAttribute(flowFile, AbstractAMQPProcessor.AMQP_TYPE_ATTRIBUTE,
builder::type);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_USER_ID_ATTRIBUTE, builder::userId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_APPID_ATTRIBUTE, builder::appId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CLUSTER_ID_ATTRIBUTE, builder::clusterId);
+
+ Map<String, Object> headers = prepareAMQPHeaders(flowFile,
selectedHeaderSource, headerSourcePrecedence, separator, pattern);
+ builder.headers(headers);
return builder.build();
}
+ /**
+ * Extract AMQP headers from incoming {@link FlowFile} based on selected
headers source value.
+ *
+ * @param flowFile used to extract headers
+ * @return {@link Map}
+ */
+ private Map<String, Object> prepareAMQPHeaders(FlowFile flowFile, String
selectedHeaderSource, String headerSourcePrecedence, Character headerSeparator,
Pattern pattern) {
Review Comment:
This should be changed to take the `HeaderSource` enum instead of the string
value and all arguments should be declared as `final`.
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -96,13 +96,44 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
-
+ public static final PropertyDescriptor HEADERS_SOURCE = new
PropertyDescriptor.Builder()
+ .name("Headers Source")
+ .displayName("Headers Source")
Review Comment:
```suggestion
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -158,10 +188,21 @@ protected void processResource(final Connection
connection, final AMQPPublisher
throw new IllegalArgumentException("Failed to determine 'routing
key' with provided value '"
+ context.getProperty(ROUTING_KEY) + "' after evaluating it as
expression against incoming FlowFile.");
}
+ String selectedHeaderSource =
context.getProperty(HEADERS_SOURCE).getValue();
Review Comment:
This should use `asDescribedValue()` and return `HeaderSource` instead of
the string value.
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -96,13 +96,44 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
-
+ public static final PropertyDescriptor HEADERS_SOURCE = new
PropertyDescriptor.Builder()
+ .name("Headers Source")
+ .displayName("Headers Source")
+ .description(
+ "The source of the headers which will be put in the
published message. They can come either from the processor property as a string
or they can be " +
+ "picked from flow file attributes based on Regex
expression.")
+ .required(true)
+ .allowableValues(InputHeaderSource.getAllowedValues())
+ .defaultValue(InputHeaderSource.STRING)
+ .build();
+ public static final PropertyDescriptor HEADERS_SOURCE_PRECEDENCE = new
PropertyDescriptor.Builder()
Review Comment:
```suggestion
public static final PropertyDescriptor HEADERS_SOURCE_PRECEDENCE = new
PropertyDescriptor.Builder()
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -96,13 +96,44 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
-
+ public static final PropertyDescriptor HEADERS_SOURCE = new
PropertyDescriptor.Builder()
+ .name("Headers Source")
+ .displayName("Headers Source")
+ .description(
+ "The source of the headers which will be put in the
published message. They can come either from the processor property as a string
or they can be " +
+ "picked from flow file attributes based on Regex
expression.")
Review Comment:
```suggestion
.description("The source of the headers which will be applied to
the published message.")
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -125,26 +156,25 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
List<PropertyDescriptor> properties = new ArrayList<>();
properties.add(EXCHANGE);
properties.add(ROUTING_KEY);
+ properties.add(HEADERS_SOURCE);
+ properties.add(HEADERS_SOURCE_PRECEDENCE);
+ properties.add(HEADERS_ATTRIBUTES_REGEX);
properties.add(HEADER_SEPARATOR);
properties.addAll(getCommonPropertyDescriptors());
propertyDescriptors = Collections.unmodifiableList(properties);
-
- Set<Relationship> rels = new HashSet<>();
- rels.add(REL_SUCCESS);
- rels.add(REL_FAILURE);
- relationships = Collections.unmodifiableSet(rels);
+ relationships = Set.of(REL_SUCCESS, REL_FAILURE);
}
-
/**
* Will construct AMQP message by extracting its body from the incoming
{@link FlowFile}. AMQP Properties will be extracted from the
* {@link FlowFile} and converted to {@link BasicProperties} to be sent
along with the message. Upon success the incoming {@link FlowFile} is
* transferred to 'success' {@link Relationship} and upon failure FlowFile
is penalized and transferred to the 'failure' {@link Relationship}
* <br>
- *
- * NOTE: Attributes extracted from {@link FlowFile} are considered
- * candidates for AMQP properties if their names are prefixed with
- * {@link PublishAMQP#ATTRIBUTES_PREFIX} (e.g., amqp$contentType=text/xml)
+ * <p>
+ * NOTE: Attributes extracted from {@link FlowFile} are considered
candidates for AMQP properties if their names are prefixed with
+ * "amq$" (e.g., amqp$contentType=text/xml). For "amqp$headers" it depends
on the value of
Review Comment:
```suggestion
* "amqp$" (e.g., amqp$contentType=text/xml). For "amqp$headers" it
depends on the value of
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -96,13 +96,44 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
-
+ public static final PropertyDescriptor HEADERS_SOURCE = new
PropertyDescriptor.Builder()
+ .name("Headers Source")
+ .displayName("Headers Source")
+ .description(
+ "The source of the headers which will be put in the
published message. They can come either from the processor property as a string
or they can be " +
+ "picked from flow file attributes based on Regex
expression.")
+ .required(true)
+ .allowableValues(InputHeaderSource.getAllowedValues())
Review Comment:
```suggestion
.allowableValues(InputHeaderSource.class)
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -268,4 +357,43 @@ private Map<String, Object>
validateAMQPHeaderProperty(String amqpPropValue, Cha
}
return headers;
}
+ public enum InputHeaderSource implements DescribedValue {
+
+ ATTRIBUTES("headersFromAttributes", "Attributes Matching Regex",
+ "Select attributes based on regex pattern to put in rabbitmq
headers. Key of the attribute will be used as header key"),
+ STRING("headersFromString", "Attribute 'amp$headers' Value",
+ "Prepare headers from 'amp$headers' attribute string"),
+ BOTH("headersFromBoth", "Regex Match And 'amp$headers' Value",
Review Comment:
The value of `BOTH` is confusing and would not translate well if some new
value were introduced. It seems like it should be removed, along with the
Precedence property.
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -268,4 +357,43 @@ private Map<String, Object>
validateAMQPHeaderProperty(String amqpPropValue, Cha
}
return headers;
}
+ public enum InputHeaderSource implements DescribedValue {
+
+ ATTRIBUTES("headersFromAttributes", "Attributes Matching Regex",
+ "Select attributes based on regex pattern to put in rabbitmq
headers. Key of the attribute will be used as header key"),
+ STRING("headersFromString", "Attribute 'amp$headers' Value",
+ "Prepare headers from 'amp$headers' attribute string"),
+ BOTH("headersFromBoth", "Regex Match And 'amp$headers' Value",
+ "Take headers from both sources: 'amp$headers' attribute and
attributes matching Regex. In case of key duplication precedence property will
define which value to take.");
+
+ private final String value;
+ private final String displayName;
+ private final String description;
+
+ InputHeaderSource(String value, String displayName, String
description) {
+
+ this.value = value;
+ this.displayName = displayName;
+ this.description = description;
+ }
+
+ public static EnumSet<InputHeaderSource> getAllowedValues() {
+ return EnumSet.of(STRING, ATTRIBUTES, BOTH);
+ }
+
+ @Override
+ public String getValue() {
+ return value;
Review Comment:
```suggestion
return name();
```
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -268,4 +357,43 @@ private Map<String, Object>
validateAMQPHeaderProperty(String amqpPropValue, Cha
}
return headers;
}
+ public enum InputHeaderSource implements DescribedValue {
+
+ ATTRIBUTES("headersFromAttributes", "Attributes Matching Regex",
+ "Select attributes based on regex pattern to put in rabbitmq
headers. Key of the attribute will be used as header key"),
+ STRING("headersFromString", "Attribute 'amp$headers' Value",
+ "Prepare headers from 'amp$headers' attribute string"),
+ BOTH("headersFromBoth", "Regex Match And 'amp$headers' Value",
+ "Take headers from both sources: 'amp$headers' attribute and
attributes matching Regex. In case of key duplication precedence property will
define which value to take.");
+
+ private final String value;
+ private final String displayName;
+ private final String description;
+
+ InputHeaderSource(String value, String displayName, String
description) {
Review Comment:
The `value` is unnecessary and the `name()` from the enum can be used
instead.
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -96,13 +96,44 @@ public class PublishAMQP extends
AbstractAMQPProcessor<AMQPPublisher> {
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
-
+ public static final PropertyDescriptor HEADERS_SOURCE = new
PropertyDescriptor.Builder()
+ .name("Headers Source")
+ .displayName("Headers Source")
+ .description(
+ "The source of the headers which will be put in the
published message. They can come either from the processor property as a string
or they can be " +
+ "picked from flow file attributes based on Regex
expression.")
+ .required(true)
+ .allowableValues(InputHeaderSource.getAllowedValues())
+ .defaultValue(InputHeaderSource.STRING)
+ .build();
+ public static final PropertyDescriptor HEADERS_SOURCE_PRECEDENCE = new
PropertyDescriptor.Builder()
+ .name("Headers Source Precedence")
Review Comment:
It seems like it would be better to remove this property and just prefer one
option or the other.
##########
nifi-extension-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/PublishAMQP.java:
##########
@@ -206,46 +247,94 @@ private byte[] extractMessage(FlowFile flowFile,
ProcessSession session) {
}
- private void updateBuilderFromAttribute(final FlowFile flowFile, final
String attribute, final Consumer<String> updater) {
- final String attributeValue = flowFile.getAttribute(ATTRIBUTES_PREFIX
+ attribute);
+ /**
+ * Reads an attribute from flowFile and pass it to the consumer function
+ *
+ * @param flowFile FlowFile for reading the attribute
+ * @param attributeKey Name of the attribute
+ * @param updater Consumer function which will use the attribute
value
+ */
+ private void readAmqpAttribute(final FlowFile flowFile, final String
attributeKey, final Consumer<String> updater) {
+ final String attributeValue = flowFile.getAttribute(attributeKey);
if (attributeValue == null) {
return;
}
try {
updater.accept(attributeValue);
} catch (final Exception e) {
- getLogger().warn("Failed to update AMQP Message Property {}",
attribute, e);
+ getLogger().warn("Failed to update AMQP Message Property [{}]",
attributeKey, e);
}
}
/**
* Extracts AMQP properties from the {@link FlowFile} attributes.
Attributes
* extracted from {@link FlowFile} are considered candidates for AMQP
- * properties if their names are prefixed with
- * {@link PublishAMQP#ATTRIBUTES_PREFIX} (e.g., amqp$contentType=text/xml).
+ * properties if their names are prefixed with "amq$" (e.g.,
amqp$contentType=text/xml).
*/
- private BasicProperties extractAmqpPropertiesFromFlowFile(FlowFile
flowFile, Character headerSeparator) {
+ private BasicProperties extractAmqpPropertiesFromFlowFile(FlowFile
flowFile, String selectedHeaderSource, String headerSourcePrecedence, Character
separator, Pattern pattern) {
final AMQP.BasicProperties.Builder builder = new
AMQP.BasicProperties.Builder();
- updateBuilderFromAttribute(flowFile, "contentType",
builder::contentType);
- updateBuilderFromAttribute(flowFile, "contentEncoding",
builder::contentEncoding);
- updateBuilderFromAttribute(flowFile, "deliveryMode", mode ->
builder.deliveryMode(Integer.parseInt(mode)));
- updateBuilderFromAttribute(flowFile, "priority", pri ->
builder.priority(Integer.parseInt(pri)));
- updateBuilderFromAttribute(flowFile, "correlationId",
builder::correlationId);
- updateBuilderFromAttribute(flowFile, "replyTo", builder::replyTo);
- updateBuilderFromAttribute(flowFile, "expiration",
builder::expiration);
- updateBuilderFromAttribute(flowFile, "messageId", builder::messageId);
- updateBuilderFromAttribute(flowFile, "timestamp", ts ->
builder.timestamp(new Date(Long.parseLong(ts))));
- updateBuilderFromAttribute(flowFile, "type", builder::type);
- updateBuilderFromAttribute(flowFile, "userId", builder::userId);
- updateBuilderFromAttribute(flowFile, "appId", builder::appId);
- updateBuilderFromAttribute(flowFile, "clusterId", builder::clusterId);
- updateBuilderFromAttribute(flowFile, "headers", headers ->
builder.headers(validateAMQPHeaderProperty(headers, headerSeparator)));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CONTENT_TYPE_ATTRIBUTE, builder::contentType);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CONTENT_ENCODING_ATTRIBUTE,
builder::contentEncoding);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_DELIVERY_MODE_ATTRIBUTE, mode ->
builder.deliveryMode(Integer.parseInt(mode)));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_PRIORITY_ATTRIBUTE, pri ->
builder.priority(Integer.parseInt(pri)));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CORRELATION_ID_ATTRIBUTE, builder::correlationId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_REPLY_TO_ATTRIBUTE, builder::replyTo);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_EXPIRATION_ATTRIBUTE, builder::expiration);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_MESSAGE_ID_ATTRIBUTE, builder::messageId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_TIMESTAMP_ATTRIBUTE, ts -> builder.timestamp(new
Date(Long.parseLong(ts))));
+ readAmqpAttribute(flowFile, AbstractAMQPProcessor.AMQP_TYPE_ATTRIBUTE,
builder::type);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_USER_ID_ATTRIBUTE, builder::userId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_APPID_ATTRIBUTE, builder::appId);
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_CLUSTER_ID_ATTRIBUTE, builder::clusterId);
+
+ Map<String, Object> headers = prepareAMQPHeaders(flowFile,
selectedHeaderSource, headerSourcePrecedence, separator, pattern);
+ builder.headers(headers);
return builder.build();
}
+ /**
+ * Extract AMQP headers from incoming {@link FlowFile} based on selected
headers source value.
+ *
+ * @param flowFile used to extract headers
+ * @return {@link Map}
+ */
+ private Map<String, Object> prepareAMQPHeaders(FlowFile flowFile, String
selectedHeaderSource, String headerSourcePrecedence, Character headerSeparator,
Pattern pattern) {
+ final Map<String, Object> headers = new HashMap<>();
+ if
(InputHeaderSource.ATTRIBUTES.getValue().equals(selectedHeaderSource)) {
+ headers.putAll(attributesToHeaders(flowFile.getAttributes(),
pattern));
+ } else if
(InputHeaderSource.STRING.getValue().equals(selectedHeaderSource)) {
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_HEADERS_ATTRIBUTE, value ->
headers.putAll(validateAMQPHeaderProperty(value, headerSeparator)));
+ } else {
+ // When precedence matches, put values in the last so it can
override keys from other source
+ if
(InputHeaderSource.ATTRIBUTES.getValue().equals(headerSourcePrecedence)) {
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_HEADERS_ATTRIBUTE, value ->
headers.putAll(validateAMQPHeaderProperty(value, headerSeparator)));
+ headers.putAll(attributesToHeaders(flowFile.getAttributes(),
pattern));
+ } else {
+ headers.putAll(attributesToHeaders(flowFile.getAttributes(),
pattern));
+ readAmqpAttribute(flowFile,
AbstractAMQPProcessor.AMQP_HEADERS_ATTRIBUTE, value ->
headers.putAll(validateAMQPHeaderProperty(value, headerSeparator)));
+ }
+ }
+ return headers;
+ }
+
+ /**
+ * Matches the pattern to keys of input attributes and output the amqp
headers map
+ * @param attributes flowFile attributes to scan for match
+ * @return Map with entries matching the pattern
+ */
+ private Map<String, String> attributesToHeaders(Map<String, String>
attributes, Pattern pattern) {
Review Comment:
```suggestion
private Map<String, String> getMatchedAttributes(final Map<String,
String> attributes, final Pattern pattern) {
```
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