org.apache.rocketmq.client.java.misc.ClientId 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.misc;
import java.util.concurrent.atomic.AtomicLong;
public class ClientId {
private static final AtomicLong INDEX = new AtomicLong(0);
private static final String CLIENT_ID_SEPARATOR = "@";
private final long index;
private final String id;
public ClientId() {
this.index = INDEX.getAndIncrement();
StringBuilder sb = new StringBuilder();
final String hostName = Utilities.hostName();
sb.append(hostName);
sb.append(CLIENT_ID_SEPARATOR);
sb.append(Utilities.processId());
sb.append(CLIENT_ID_SEPARATOR);
sb.append(index);
sb.append(CLIENT_ID_SEPARATOR);
sb.append(Long.toString(System.nanoTime(), 36));
this.id = sb.toString();
}
/**
* Client index within current process.
*
* @return index.
*/
public long getIndex() {
return index;
}
@Override
public String toString() {
return id;
}
}