/*
* 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.core.location.cloud.names;
import org.apache.brooklyn.api.entity.Application;
import org.apache.brooklyn.api.entity.Entity;
import org.apache.brooklyn.core.location.cloud.CloudLocationConfig;
import org.apache.brooklyn.util.core.config.ConfigBag;
import org.apache.brooklyn.util.text.StringShortener;
import org.apache.brooklyn.util.text.Strings;
/**
* Standard implementation of {@link CloudMachineNamer},
* which looks at several of the properties of the context (entity)
* and is clever about abbreviating them. */
public class BasicCloudMachineNamer extends AbstractCloudMachineNamer {
@Override
protected String generateNewIdOfLength(ConfigBag setup, int len) {
Object context = setup.peek(CloudLocationConfig.CALLER_CONTEXT);
Entity entity = null;
if (context instanceof Entity) entity = (Entity) context;
StringShortener shortener = Strings.shortener().separator("-");
shortener.append("system", "brooklyn");
/* timeStamp replaces the previously used randId.
*
* timeStamp uses the standard unix timestamp represented as a 8-char hex string.
*
* It represents the moment in time when the name is constructed.
* It gives the possibility to search easily for instances, security groups, keypairs, etc
* based on timestamp without complicated enumeration
*/
shortener.append("timeStamp", Long.toString(System.currentTimeMillis() / 1000L, Character.MAX_RADIX));
String user = System.getProperty("user.name");
if (!"brooklyn".equals(user))
// include user; unless the user is 'brooklyn', as 'brooklyn-brooklyn-' is just silly!
shortener.append("user", user);
if (entity!=null) {
Application app = entity.getApplication();
if (app!=null) {
shortener.append("app", shortName(app))
.append("appId", app.getId());
}
shortener.append("entity", shortName(entity))
.append("entityId", entity.getId());
} else if (context!=null) {
shortener.append("context", context.toString());
}
shortener.truncate("user", 12)
.truncate("app", 16)
.truncate("entity", 16)
.truncate("appId", 4)
.truncate("entityId", 4)
.truncate("context", 12);
shortener.canTruncate("user", 8)
.canTruncate("app", 5)
.canTruncate("entity", 5)
.canTruncate("system", 2)
.canTruncate("app", 3)
.canTruncate("entity", 3)
.canRemove("app")
.canTruncate("user", 4)
.canRemove("entity")
.canTruncate("context", 4)
.canTruncate("timeStamp", 6)
.canRemove("user")
.canTruncate("appId", 2)
.canRemove("appId");
String s = shortener.getStringOfMaxLength(len);
return sanitize(s).toLowerCase();
}
}