/*************************GO-LICENSE-START*********************************
* Copyright 2014 ThoughtWorks, Inc.
*
* Licensed 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.
*************************GO-LICENSE-END***********************************/
package com.thoughtworks.go.config.validation;
import com.thoughtworks.go.config.CruiseConfig;
import com.thoughtworks.go.config.ServerConfig;
import com.thoughtworks.go.util.SystemEnvironment;
/**
* @understands: ensures serverId is never changed
*/
public class ServerIdImmutabilityValidator implements GoConfigValidator {
private String serverId;
private SystemEnvironment env;
public ServerIdImmutabilityValidator() {
env = new SystemEnvironment();
}
public void validate(CruiseConfig cruiseConfig) throws Exception {
ServerConfig server = cruiseConfig.server();
String newServerId = server.getServerId();
if (serverId == null) {
serverId = newServerId;
}
if (serverId == null || serverId.equals(newServerId) || ! env.enforceServerIdImmutability()) {
return;
}
throw new RuntimeException("The value of 'serverId' uniquely identifies a Go server instance. This field cannot be modified.");
}
}