org.apache.rocketmq.client.java.impl.consumer.PushConsumerBuilderImpl Maven / Gradle / Ivy
/*
* 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.java.impl.consumer;
import static org.apache.rocketmq.shaded.com.google.common.base.Preconditions.checkArgument;
import static org.apache.rocketmq.shaded.com.google.common.base.Preconditions.checkNotNull;
import static org.apache.rocketmq.client.java.impl.consumer.ConsumerImpl.CONSUMER_GROUP_PATTERN;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.rocketmq.client.apis.ClientConfiguration;
import org.apache.rocketmq.client.apis.ClientException;
import org.apache.rocketmq.client.apis.consumer.FilterExpression;
import org.apache.rocketmq.client.apis.consumer.MessageListener;
import org.apache.rocketmq.client.apis.consumer.PushConsumer;
import org.apache.rocketmq.client.apis.consumer.PushConsumerBuilder;
/**
* Implementation of {@link PushConsumerBuilder}
*/
public class PushConsumerBuilderImpl implements PushConsumerBuilder {
private ClientConfiguration clientConfiguration = null;
private String consumerGroup = null;
private Map subscriptionExpressions = new ConcurrentHashMap<>();
private MessageListener messageListener = null;
private int maxCacheMessageCount = 1024;
private int maxCacheMessageSizeInBytes = 64 * 1024 * 1024;
private int consumptionThreadCount = 20;
/**
* @see PushConsumerBuilder#setClientConfiguration(ClientConfiguration)
*/
@Override
public PushConsumerBuilder setClientConfiguration(ClientConfiguration clientConfiguration) {
this.clientConfiguration = checkNotNull(clientConfiguration, "clientConfiguration should not be null");
return this;
}
/**
* @see PushConsumerBuilder#setConsumerGroup(String)
*/
@Override
public PushConsumerBuilder setConsumerGroup(String consumerGroup) {
checkNotNull(consumerGroup, "consumerGroup should not be null");
checkArgument(CONSUMER_GROUP_PATTERN.matcher(consumerGroup).matches(), "consumerGroup does not match the "
+ "regex [regex=%s]", CONSUMER_GROUP_PATTERN.pattern());
this.consumerGroup = consumerGroup;
return this;
}
/**
* @see PushConsumerBuilder#setSubscriptionExpressions(Map)
*/
@Override
public PushConsumerBuilder setSubscriptionExpressions(Map subscriptionExpressions) {
checkNotNull(subscriptionExpressions, "subscriptionExpressions should not be null");
checkArgument(!subscriptionExpressions.isEmpty(), "subscriptionExpressions should not be empty");
this.subscriptionExpressions = subscriptionExpressions;
return this;
}
/**
* @see PushConsumerBuilder#setMessageListener(MessageListener)
*/
@Override
public PushConsumerBuilder setMessageListener(MessageListener messageListener) {
this.messageListener = checkNotNull(messageListener, "messageListener should not be null");
return this;
}
/**
* @see PushConsumerBuilder#setMaxCacheMessageCount(int)
*/
@Override
public PushConsumerBuilder setMaxCacheMessageCount(int maxCachedMessageCount) {
checkArgument(maxCachedMessageCount > 0, "maxCachedMessageCount should be positive");
this.maxCacheMessageCount = maxCachedMessageCount;
return this;
}
/**
* @see PushConsumerBuilder#setMaxCacheMessageSizeInBytes(int)
*/
@Override
public PushConsumerBuilder setMaxCacheMessageSizeInBytes(int maxCacheMessageSizeInBytes) {
checkArgument(maxCacheMessageSizeInBytes > 0, "maxCacheMessageSizeInBytes should be positive");
this.maxCacheMessageSizeInBytes = maxCacheMessageSizeInBytes;
return this;
}
/**
* @see PushConsumerBuilder#setConsumptionThreadCount(int)
*/
@Override
public PushConsumerBuilder setConsumptionThreadCount(int consumptionThreadCount) {
checkArgument(consumptionThreadCount > 0, "consumptionThreadCount should be positive");
this.consumptionThreadCount = consumptionThreadCount;
return this;
}
/**
* @see PushConsumerBuilder#build()
*/
@Override
public PushConsumer build() throws ClientException {
checkNotNull(clientConfiguration, "clientConfiguration has not been set yet");
checkNotNull(consumerGroup, "consumerGroup has not been set yet");
checkNotNull(messageListener, "messageListener has not been set yet");
checkArgument(!subscriptionExpressions.isEmpty(), "subscriptionExpressions have not been set yet");
final PushConsumerImpl pushConsumer = new PushConsumerImpl(clientConfiguration, consumerGroup,
subscriptionExpressions, messageListener, maxCacheMessageCount, maxCacheMessageSizeInBytes,
consumptionThreadCount);
pushConsumer.startAsync().awaitRunning();
return pushConsumer;
}
}