Java tutorial
/* * 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.brooklyn.entity.zookeeper; import java.net.URI; import org.apache.brooklyn.core.entity.Attributes; import org.apache.brooklyn.core.location.access.BrooklynAccessUtils; import com.google.common.net.HostAndPort; /** * An {@link org.apache.brooklyn.api.entity.Entity} that represents a single standalone zookeeper instance. */ public class ZooKeeperNodeImpl extends AbstractZooKeeperImpl implements ZooKeeperNode { public ZooKeeperNodeImpl() { } @Override public void init() { super.init(); // MY_ID was changed from a sensor to config. Publish it as a sensor to maintain // compatibility with any blueprints that reference it. Integer myId = config().get(MY_ID); if (myId == null) { throw new NullPointerException("Require value for " + MY_ID.getName()); } sensors().set(MY_ID, myId); } @Override public Class<?> getDriverInterface() { return ZooKeeperDriver.class; } @Override protected void postStart() { super.postStart(); HostAndPort hap = BrooklynAccessUtils.getBrooklynAccessibleAddress(this, sensors().get(ZOOKEEPER_PORT)); sensors().set(ZooKeeperNode.ZOOKEEPER_ENDPOINT, hap.toString()); sensors().set(Attributes.MAIN_URI, URI.create("zk://" + hap.toString())); } }