/* 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.
*/
package org.activiti.engine.impl.db;
import org.activiti.engine.impl.cfg.IdGenerator;
import org.activiti.engine.impl.cmd.GetNextIdBlockCmd;
import org.activiti.engine.impl.interceptor.CommandConfig;
import org.activiti.engine.impl.interceptor.CommandExecutor;
/**
* @author Tom Baeyens
*/
public class DbIdGenerator implements IdGenerator {
protected int idBlockSize;
protected long nextId = 0;
protected long lastId = -1;
protected CommandExecutor commandExecutor;
protected CommandConfig commandConfig;
public synchronized String getNextId() {
if (lastId<nextId) {
getNewBlock();
}
long _nextId = nextId++;
return Long.toString(_nextId);
}
protected synchronized void getNewBlock() {
IdBlock idBlock = commandExecutor.execute(commandConfig, new GetNextIdBlockCmd(idBlockSize));
this.nextId = idBlock.getNextId();
this.lastId = idBlock.getLastId();
}
public int getIdBlockSize() {
return idBlockSize;
}
public void setIdBlockSize(int idBlockSize) {
this.idBlockSize = idBlockSize;
}
public CommandExecutor getCommandExecutor() {
return commandExecutor;
}
public void setCommandExecutor(CommandExecutor commandExecutor) {
this.commandExecutor = commandExecutor;
}
public CommandConfig getCommandConfig() {
return commandConfig;
}
public void setCommandConfig(CommandConfig commandConfig) {
this.commandConfig = commandConfig;
}
}