/*
* Copyright 2013 Cloudera 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.
*/
package com.cloudera.cdk.morphline.base;
import java.util.List;
import com.cloudera.cdk.morphline.api.Command;
import com.cloudera.cdk.morphline.api.Record;
/**
* Tools for notifications on the control plane.
*/
public final class Notifications {
public static final String LIFE_CYLCLE = "lifecycle";
public static List getLifecycleEvents(Record notification) {
return notification.get(LIFE_CYLCLE);
}
public static void notifyBeginTransaction(Command command) {
notify(command, LifecycleEvent.BEGIN_TRANSACTION);
}
public static void notifyCommitTransaction(Command command) {
notify(command, LifecycleEvent.COMMIT_TRANSACTION);
}
public static void notifyRollbackTransaction(Command command) {
notify(command, LifecycleEvent.ROLLBACK_TRANSACTION);
}
public static void notifyShutdown(Command command) {
notify(command, LifecycleEvent.SHUTDOWN);
}
public static void notifyStartSession(Command command) {
notify(command, LifecycleEvent.START_SESSION);
}
private static void notify(Command command, LifecycleEvent event) {
Record notification = new Record();
notification.put(LIFE_CYLCLE, event);
command.notify(notification);
}
public static boolean containsLifecycleEvent(Record notification, LifecycleEvent event) {
return getLifecycleEvents(notification).contains(event);
}
///////////////////////////////////////////////////////////////////////////////
// Nested classes:
///////////////////////////////////////////////////////////////////////////////
public static enum LifecycleEvent {
BEGIN_TRANSACTION,
COMMIT_TRANSACTION,
ROLLBACK_TRANSACTION,
SHUTDOWN,
START_SESSION;
}
}