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Posted to dev@nifi.apache.org by olegz <gi...@git.apache.org> on 2016/04/12 18:10:46 UTC
[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
GitHub user olegz opened a pull request:
https://github.com/apache/nifi/pull/345
NIFI-1296[REVIEW_ONLY] initial commit of Kafka processors that leverage Kafka 0.9 API
This PR is not ready to be merged and is only to initiate incremental review and initial testing of a new pair of Kafka processors that are build using Kafka 0.9 API
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/olegz/nifi NIFI-1296
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/nifi/pull/345.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #345
----
commit 465f1e049bbc37aaed1864121c6e8bc18d05e8ee
Author: Oleg Zhurakousky <ol...@suitcase.io>
Date: 2016-04-07T11:15:25Z
NIFI-1296 initial commit of Kafka processors that leverage Kafka 0.9 API
----
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[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
Posted by bbende <gi...@git.apache.org>.
Github user bbende commented on a diff in the pull request:
https://github.com/apache/nifi/pull/345#discussion_r60256873
--- Diff: nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-pubsub-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/AbstractKafkaProcessor.java ---
@@ -0,0 +1,254 @@
+package org.apache.nifi.processors.kafka.pubsub;
+
+import java.io.Closeable;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.regex.Pattern;
+
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.nifi.annotation.lifecycle.OnStopped;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.PropertyDescriptor.Builder;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.processor.AbstractSessionFactoryProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessSessionFactory;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.util.FormatUtils;
+
+abstract class AbstractKafkaProcessor<T extends Closeable> extends AbstractSessionFactoryProcessor {
+
+ private static final String SINGLE_BROKER_REGEX = ".*?\\:\\d{3,5}";
+
+ private static final String BROKER_REGEX = SINGLE_BROKER_REGEX + "(?:,\\s*" + SINGLE_BROKER_REGEX + ")*";
+
+
+ static final AllowableValue SEC_PLAINTEXT = new AllowableValue("PLAINTEXT", "PLAINTEXT", "PLAINTEXT");
+ static final AllowableValue SEC_SSL = new AllowableValue("SSL", "SSL", "SSL");
+ static final AllowableValue SEC_SASL_PLAINTEXT = new AllowableValue("SASL_PLAINTEXT", "SASL_PLAINTEXT", "SASL_PLAINTEXT");
+ static final AllowableValue SEC_SASL_SSL = new AllowableValue("SASL_SSL", "SASL_SSL", "SASL_SSL");
+
+ static final PropertyDescriptor BOOTSTRAP_SERVERS = new PropertyDescriptor.Builder()
+ .name(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG)
+ .displayName("Kafka Brokers")
+ .description("A comma-separated list of known Kafka Brokers in the format <host>:<port>")
+ .required(true)
+ .addValidator(StandardValidators.createRegexMatchingValidator(Pattern.compile(BROKER_REGEX)))
+ .expressionLanguageSupported(false)
--- End diff --
Also wondering if we should support EL here for the same reason I mentioned in the other comment. Seems like the brokers and the topic would be the likely things to change across dev/prod environments.
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[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
Posted by olegz <gi...@git.apache.org>.
Github user olegz commented on a diff in the pull request:
https://github.com/apache/nifi/pull/345#discussion_r60270023
--- Diff: nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-pubsub-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/AbstractKafkaProcessor.java ---
@@ -0,0 +1,254 @@
+package org.apache.nifi.processors.kafka.pubsub;
+
+import java.io.Closeable;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.regex.Pattern;
+
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.nifi.annotation.lifecycle.OnStopped;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.PropertyDescriptor.Builder;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.processor.AbstractSessionFactoryProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessSessionFactory;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.util.FormatUtils;
+
+abstract class AbstractKafkaProcessor<T extends Closeable> extends AbstractSessionFactoryProcessor {
+
+ private static final String SINGLE_BROKER_REGEX = ".*?\\:\\d{3,5}";
+
+ private static final String BROKER_REGEX = SINGLE_BROKER_REGEX + "(?:,\\s*" + SINGLE_BROKER_REGEX + ")*";
+
+
+ static final AllowableValue SEC_PLAINTEXT = new AllowableValue("PLAINTEXT", "PLAINTEXT", "PLAINTEXT");
+ static final AllowableValue SEC_SSL = new AllowableValue("SSL", "SSL", "SSL");
+ static final AllowableValue SEC_SASL_PLAINTEXT = new AllowableValue("SASL_PLAINTEXT", "SASL_PLAINTEXT", "SASL_PLAINTEXT");
+ static final AllowableValue SEC_SASL_SSL = new AllowableValue("SASL_SSL", "SASL_SSL", "SASL_SSL");
+
+ static final PropertyDescriptor BOOTSTRAP_SERVERS = new PropertyDescriptor.Builder()
+ .name(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG)
+ .displayName("Kafka Brokers")
+ .description("A comma-separated list of known Kafka Brokers in the format <host>:<port>")
+ .required(true)
+ .addValidator(StandardValidators.createRegexMatchingValidator(Pattern.compile(BROKER_REGEX)))
+ .expressionLanguageSupported(false)
--- End diff --
Now you made me think ;) since I think what you're saying is that EL can pull a value from properties, environment etc, correct? And if so, then that is definitely valid for both, so I am retracting my comment from before
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[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
Posted by olegz <gi...@git.apache.org>.
Github user olegz commented on the pull request:
https://github.com/apache/nifi/pull/345#issuecomment-212039891
Closing this PR and will submit new one for final review
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[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
Posted by olegz <gi...@git.apache.org>.
Github user olegz closed the pull request at:
https://github.com/apache/nifi/pull/345
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[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
Posted by bbende <gi...@git.apache.org>.
Github user bbende commented on a diff in the pull request:
https://github.com/apache/nifi/pull/345#discussion_r60256134
--- Diff: nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-pubsub-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java ---
@@ -0,0 +1,197 @@
+/*
+ * 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.kafka.pubsub;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.common.serialization.ByteArrayDeserializer;
+import org.apache.nifi.annotation.behavior.InputRequirement;
+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.OnStopped;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.io.OutputStreamCallback;
+import org.apache.nifi.processor.util.StandardValidators;
+
+@InputRequirement(Requirement.INPUT_FORBIDDEN)
+@CapabilityDescription("Consumes messages from Apache Kafka")
+@Tags({ "Kafka", "Get", "Ingest", "Ingress", "Topic", "PubSub", "Consume" })
+public class ConsumeKafka extends AbstractKafkaProcessor<KafkaConsumer<byte[], byte[]>> {
+
+ static final AllowableValue OFFSET_EARLIEST = new AllowableValue("earliest", "earliest", "Automatically reset the offset to the earliest offset");
+
+ static final AllowableValue OFFSET_LATEST = new AllowableValue("latest", "latest", "Automatically reset the offset to the latest offset");
+
+ static final AllowableValue OFFSET_NONE = new AllowableValue("none", "none", "Throw exception to the consumer if no previous offset is found for the consumer's group");
+
+ static final PropertyDescriptor TOPIC = TOPIC_BUILDER
+ .expressionLanguageSupported(false)
--- End diff --
Any reason why EL is not supported here, but it is supported in PublishKafka?
I think we would want both to support it for people who want to externalize properties into bootstrap.conf to make their flow portable across environments. I realize on the consumer side there is no FlowFile to evaluate against, but you can still evaluate without a flow file.
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[GitHub] nifi pull request: NIFI-1296[REVIEW_ONLY] initial commit of Kafka ...
Posted by olegz <gi...@git.apache.org>.
Github user olegz commented on a diff in the pull request:
https://github.com/apache/nifi/pull/345#discussion_r60269808
--- Diff: nifi-nar-bundles/nifi-kafka-bundle/nifi-kafka-pubsub-processors/src/main/java/org/apache/nifi/processors/kafka/pubsub/ConsumeKafka.java ---
@@ -0,0 +1,197 @@
+/*
+ * 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.kafka.pubsub;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.common.serialization.ByteArrayDeserializer;
+import org.apache.nifi.annotation.behavior.InputRequirement;
+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.OnStopped;
+import org.apache.nifi.components.AllowableValue;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.io.OutputStreamCallback;
+import org.apache.nifi.processor.util.StandardValidators;
+
+@InputRequirement(Requirement.INPUT_FORBIDDEN)
+@CapabilityDescription("Consumes messages from Apache Kafka")
+@Tags({ "Kafka", "Get", "Ingest", "Ingress", "Topic", "PubSub", "Consume" })
+public class ConsumeKafka extends AbstractKafkaProcessor<KafkaConsumer<byte[], byte[]>> {
+
+ static final AllowableValue OFFSET_EARLIEST = new AllowableValue("earliest", "earliest", "Automatically reset the offset to the earliest offset");
+
+ static final AllowableValue OFFSET_LATEST = new AllowableValue("latest", "latest", "Automatically reset the offset to the latest offset");
+
+ static final AllowableValue OFFSET_NONE = new AllowableValue("none", "none", "Throw exception to the consumer if no previous offset is found for the consumer's group");
+
+ static final PropertyDescriptor TOPIC = TOPIC_BUILDER
+ .expressionLanguageSupported(false)
--- End diff --
Valid suggestion, but at this point it's all about consistency and symmetry to the existing Get/PutKafka and in PUT EL is enabled while in GET it is not
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