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/*
 * 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.client.consumer;

import java.util.Set;
import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.message.MessageExt;
import org.apache.rocketmq.common.message.MessageQueue;
import org.apache.rocketmq.remoting.exception.RemotingException;

/**
 * Pulling consumer interface
 */
public interface MQPullConsumer extends MQConsumer {
    /**
     * Start the consumer
     */
    void start() throws MQClientException;

    /**
     * Shutdown the consumer
     */
    void shutdown();

    /**
     * Register the message queue listener
     */
    void registerMessageQueueListener(final String topic, final MessageQueueListener listener);

    /**
     * Pulling the messages,not blocking
     *
     * @param mq from which message queue
     * @param subExpression subscription expression.it only support or operation such as "tag1 || tag2 || tag3" 
if * null or * expression,meaning subscribe all * @param offset from where to pull * @param maxNums max pulling numbers * @return The resulting {@code PullRequest} */ PullResult pull(final MessageQueue mq, final String subExpression, final long offset, final int maxNums) throws MQClientException, RemotingException, MQBrokerException, InterruptedException; /** * Pulling the messages in the specified timeout * * @return The resulting {@code PullRequest} */ PullResult pull(final MessageQueue mq, final String subExpression, final long offset, final int maxNums, final long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException; /** * Pulling the messages, not blocking *

* support other message selection, such as {@link org.apache.rocketmq.common.filter.ExpressionType#SQL92} *

* * @param mq from which message queue * @param selector message selector({@link MessageSelector}), can be null. * @param offset from where to pull * @param maxNums max pulling numbers * @return The resulting {@code PullRequest} */ PullResult pull(final MessageQueue mq, final MessageSelector selector, final long offset, final int maxNums) throws MQClientException, RemotingException, MQBrokerException, InterruptedException; /** * Pulling the messages in the specified timeout *

* support other message selection, such as {@link org.apache.rocketmq.common.filter.ExpressionType#SQL92} *

* * @param mq from which message queue * @param selector message selector({@link MessageSelector}), can be null. * @param offset from where to pull * @param maxNums max pulling numbers * @param timeout Pulling the messages in the specified timeout * @return The resulting {@code PullRequest} */ PullResult pull(final MessageQueue mq, final MessageSelector selector, final long offset, final int maxNums, final long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException; /** * Pulling the messages in a async. way */ void pull(final MessageQueue mq, final String subExpression, final long offset, final int maxNums, final PullCallback pullCallback) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages in a async. way */ void pull(final MessageQueue mq, final String subExpression, final long offset, final int maxNums, final PullCallback pullCallback, long timeout) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages in a async. way */ void pull(final MessageQueue mq, final String subExpression, final long offset, final int maxNums, final int maxSize, final PullCallback pullCallback, long timeout) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages in a async way. Support message selection */ void pull(final MessageQueue mq, final MessageSelector selector, final long offset, final int maxNums, final PullCallback pullCallback) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages in a async. way. Support message selection */ void pull(final MessageQueue mq, final MessageSelector selector, final long offset, final int maxNums, final PullCallback pullCallback, long timeout) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages,if no message arrival,blocking some time * * @return The resulting {@code PullRequest} */ PullResult pullBlockIfNotFound(final MessageQueue mq, final String subExpression, final long offset, final int maxNums) throws MQClientException, RemotingException, MQBrokerException, InterruptedException; /** * Pulling the messages through callback function,if no message arrival,blocking. */ void pullBlockIfNotFound(final MessageQueue mq, final String subExpression, final long offset, final int maxNums, final PullCallback pullCallback) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages through callback function,if no message arrival,blocking. Support message selection */ void pullBlockIfNotFoundWithMessageSelector(final MessageQueue mq, final MessageSelector selector, final long offset, final int maxNums, final PullCallback pullCallback) throws MQClientException, RemotingException, InterruptedException; /** * Pulling the messages,if no message arrival,blocking some time. Support message selection * * @return The resulting {@code PullRequest} */ PullResult pullBlockIfNotFoundWithMessageSelector(final MessageQueue mq, final MessageSelector selector, final long offset, final int maxNums) throws MQClientException, RemotingException, MQBrokerException, InterruptedException; /** * Update the offset */ void updateConsumeOffset(final MessageQueue mq, final long offset) throws MQClientException; /** * Fetch the offset * * @return The fetched offset of given queue */ long fetchConsumeOffset(final MessageQueue mq, final boolean fromStore) throws MQClientException; /** * Fetch the message queues according to the topic * * @param topic message topic * @return message queue set */ Set fetchMessageQueuesInBalance(final String topic) throws MQClientException; /** * If consuming failure,message will be send back to the broker,and delay consuming in some time later.
* Mind! message can only be consumed in the same group. */ void sendMessageBack(MessageExt msg, int delayLevel, String brokerName, String consumerGroup) throws RemotingException, MQBrokerException, InterruptedException, MQClientException; }




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