org.apache.rocketmq.client.java.message.MessageBuilderImpl 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.message;
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 java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.regex.Pattern;
import org.apache.rocketmq.shaded.commons.lang3.StringUtils;
import org.apache.rocketmq.client.apis.message.Message;
import org.apache.rocketmq.client.apis.message.MessageBuilder;
public class MessageBuilderImpl implements MessageBuilder {
public static final Pattern TOPIC_PATTERN = Pattern.compile("^[%a-zA-Z0-9_-]+$");
private String topic = null;
private byte[] body = null;
private String tag = null;
private String messageGroup = null;
private Long deliveryTimestamp = null;
private Collection keys = new HashSet<>();
private final Map properties = new HashMap<>();
public MessageBuilderImpl() {
}
/**
* See {@link MessageBuilder#setTopic(String)}
*/
@Override
public MessageBuilder setTopic(String topic) {
checkNotNull(topic, "topic should not be null");
checkArgument(TOPIC_PATTERN.matcher(topic).matches(), "topic does not match the regex [regex=%s]",
TOPIC_PATTERN.pattern());
this.topic = topic;
return this;
}
/**
* See {@link MessageBuilder#setBody(byte[])}
*/
@Override
public MessageBuilder setBody(byte[] body) {
checkNotNull(body, "body should not be null");
this.body = body.clone();
return this;
}
/**
* See {@link MessageBuilder#setTag(String)}
*/
@Override
public MessageBuilder setTag(String tag) {
checkArgument(StringUtils.isNotBlank(tag), "tag should not be blank");
checkArgument(!tag.contains("|"), "tag should not contain \"|\"");
this.tag = tag;
return this;
}
/**
* See {@link MessageBuilder#setKeys(String...)}
*/
@Override
public MessageBuilder setKeys(String... keys) {
for (String key : keys) {
checkArgument(StringUtils.isNotBlank(key), "key should not be blank");
}
this.keys = new ArrayList<>();
this.keys.addAll(Arrays.asList(keys));
return this;
}
/**
* See {@link MessageBuilder#setMessageGroup(String)}
*/
@Override
public MessageBuilder setMessageGroup(String messageGroup) {
checkArgument(null == deliveryTimestamp, "messageGroup and deliveryTimestamp should not be set at same time");
checkArgument(StringUtils.isNotBlank(messageGroup), "messageGroup should not be blank");
this.messageGroup = messageGroup;
return this;
}
/**
* See {@link MessageBuilder#setDeliveryTimestamp(long)}
*/
@Override
public MessageBuilder setDeliveryTimestamp(long deliveryTimestamp) {
checkArgument(null == messageGroup, "deliveryTimestamp and messageGroup should not be set at same time");
this.deliveryTimestamp = deliveryTimestamp;
return this;
}
/**
* See {@link MessageBuilder#addProperty(String, String)}
*/
@Override
public MessageBuilder addProperty(String key, String value) {
checkArgument(StringUtils.isNotBlank(key), "key should not be blank");
checkArgument(StringUtils.isNotBlank(value), "value should not be blank");
this.properties.put(key, value);
return this;
}
/**
* See {@link MessageBuilder#build()}
*/
@Override
public Message build() {
checkNotNull(topic, "topic has not been set yet");
checkNotNull(body, "body has not been set yet");
return new MessageImpl(topic, body, tag, keys, messageGroup, deliveryTimestamp, properties);
}
}