You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2022/03/25 03:11:15 UTC
[GitHub] [rocketmq] zhouxinyu commented on a change in pull request #4019: [RIP-37] Add new APIs for consumer
zhouxinyu commented on a change in pull request #4019:
URL: https://github.com/apache/rocketmq/pull/4019#discussion_r834911426
##########
File path: apis/src/main/java/org/apache/rocketmq/apis/consumer/PullConsumerBuilder.java
##########
@@ -0,0 +1,66 @@
+/*
+ * 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.rocketmq.apis.consumer;
+
+import org.apache.rocketmq.apis.ClientConfiguration;
+import org.apache.rocketmq.apis.exception.ClientException;
+
+import java.time.Duration;
+
+public interface PullConsumerBuilder {
+ /**
+ * Set the client configuration for pull consumer.
+ *
+ * @param clientConfiguration client's configuration.
+ * @return the pull consumer builder instance.
+ */
+ PullConsumerBuilder setClientConfiguration(ClientConfiguration clientConfiguration);
+
+ /**
+ * Set the load balancing group for consumer.
+ *
+ * @param consumerGroup consumer load balancing group.
+ * @return the consumer builder instance.
+ */
+ PullConsumerBuilder setConsumerGroup(String consumerGroup);
+
+ /**
+ * Enable manual messageQueue assignment consumption mode.
+ * <p> The default mode is subscription mode which manage the rebalance operation triggered when group membership or cluster and topic metadata change.
+ * When pull consumer manual queue assignment mode, must invoke assign method before pull message.
+ * @return the consumer builder instance.
+ */
+ PushConsumerBuilder enableManualAssignment();
Review comment:
Return PullConsumerBuilder
##########
File path: apis/src/main/java/org/apache/rocketmq/apis/consumer/PullConsumerBuilder.java
##########
@@ -0,0 +1,66 @@
+/*
+ * 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.rocketmq.apis.consumer;
+
+import org.apache.rocketmq.apis.ClientConfiguration;
+import org.apache.rocketmq.apis.exception.ClientException;
+
+import java.time.Duration;
+
+public interface PullConsumerBuilder {
+ /**
+ * Set the client configuration for pull consumer.
+ *
+ * @param clientConfiguration client's configuration.
+ * @return the pull consumer builder instance.
+ */
+ PullConsumerBuilder setClientConfiguration(ClientConfiguration clientConfiguration);
+
+ /**
+ * Set the load balancing group for consumer.
+ *
+ * @param consumerGroup consumer load balancing group.
+ * @return the consumer builder instance.
+ */
+ PullConsumerBuilder setConsumerGroup(String consumerGroup);
+
+ /**
+ * Enable manual messageQueue assignment consumption mode.
+ * <p> The default mode is subscription mode which manage the rebalance operation triggered when group membership or cluster and topic metadata change.
+ * When pull consumer manual queue assignment mode, must invoke assign method before pull message.
+ * @return the consumer builder instance.
+ */
+ PushConsumerBuilder enableManualAssignment();
+
+ /**
+ * Set the max await time when receive message from server.
+ * <p> The simple consumer will hold this long-polling receive requests until a message is returned or a timeout occurs.
+ * @param awaitDuration The maximum time to block when no message available.
+ * @return the consumer builder instance.
+ */
+ PushConsumerBuilder setAwaitDuration(Duration awaitDuration);
Review comment:
Return PullConsumerBuilder
##########
File path: apis/src/main/java/org/apache/rocketmq/apis/consumer/SimpleConsumer.java
##########
@@ -0,0 +1,154 @@
+/*
+ * 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.rocketmq.apis.consumer;
+
+import java.io.Closeable;
+import java.time.Duration;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import org.apache.rocketmq.apis.exception.*;
+import org.apache.rocketmq.apis.message.MessageView;
+
+/**
+ * SimpleConsumer is a thread-safe rocketmq client which is used to consume message by group.
+ *
+ * <p>Simple consumer is lightweight consumer , if you want fully control the message consumption operation by yourself,
+ * simple consumer should be your first consideration.
+ *
+ * <p>Consumers belong to the same consumer group share messages from server,
+ * so consumer in the same group must have the same {@link SubscriptionExpression}s, otherwise the behavior is
+ * undefined. If a new consumer group's consumer is started first time, it consumes from the latest position. Once
+ * consumer is started, server records its consumption progress and derives it in subsequent startup.
+ *
+ * <p>You may intend to maintain different consumption progress for different consumer, different consumer group
+ * should be set in this case.
+ *
+ * <p> Simple consumer divide message consumption to 3 parts.
+ * Firstly, call receive api get messages from server; Then process message by yourself; At last, your must call Ack api to commit this message.
+ * If there is error when process message ,your can reconsume the message later which control by the invisibleDuration parameter.
+ * Also, you can change the invisibleDuration by call changeInvisibleDuration api.
+ */
+public interface SimpleConsumer extends Closeable {
+ /**
+ * Get the load balancing group for simple consumer.
+ *
+ * @return consumer load balancing group.
+ */
+ String getConsumerGroup();
+
+ /**
+ * Add subscription expression dynamically.
+ *
+ * <p>If first {@link SubscriptionExpression} that contains topicA and tag1 is exists already in consumer, then
+ * second {@link SubscriptionExpression} which contains topicA and tag2, <strong>the result is that the second one
+ * replaces the first one instead of integrating them</strong>.
+ *
+ * @param subscriptionExpression new subscription expression to add.
+ * @return simple consumer instance.
+ */
+ SimpleConsumer subscribe(SubscriptionExpression subscriptionExpression) throws ClientException;
Review comment:
Each consumer has subscription management and consumer group, consider abstract a super interface type?
##########
File path: apis/src/main/java/org/apache/rocketmq/apis/consumer/PullConsumer.java
##########
@@ -0,0 +1,186 @@
+/*
+ * 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.rocketmq.apis.consumer;
+
+import java.io.Closeable;
+import java.time.Duration;
+import java.util.Collection;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+
+import org.apache.rocketmq.apis.MessageQueue;
+import org.apache.rocketmq.apis.exception.*;
+import org.apache.rocketmq.apis.message.MessageView;
+
+/**
+ * <p>PullConsumer is a thread-safe rocketmq client which is used to consume message by queue.
+ * Unlike push consumer and simple consumer, pull consumer implement load balance based on queue granularity.
+ *
+ * <p>Pull consumer is lightweight consumer that better suited to streaming scenarios.
+ * If you want fully control the message consumption operation by yourself like scan by offset or reconsume repeatedly,
+ * pull consumer should be your first consideration.
+ *
+ * <p>Pull consumer support two load balance mode. First is subscription mode, which full manage the rebalance
Review comment:
two load balance modes.
##########
File path: apis/src/main/java/org/apache/rocketmq/apis/consumer/SimpleConsumer.java
##########
@@ -0,0 +1,154 @@
+/*
+ * 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.rocketmq.apis.consumer;
+
+import java.io.Closeable;
+import java.time.Duration;
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import org.apache.rocketmq.apis.exception.*;
+import org.apache.rocketmq.apis.message.MessageView;
+
+/**
+ * SimpleConsumer is a thread-safe rocketmq client which is used to consume message by group.
+ *
+ * <p>Simple consumer is lightweight consumer , if you want fully control the message consumption operation by yourself,
+ * simple consumer should be your first consideration.
Review comment:
Consider adding the difference between SimpleConsumer and PullConsumer.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: dev-unsubscribe@rocketmq.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org