| /** |
| * 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.hadoop.hbase.procedure2; |
| |
| import java.io.IOException; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.apache.yetus.audience.InterfaceStability; |
| |
| /** |
| * Special procedure used as a chore. |
| * Instead of bringing the Chore class in (dependencies reason), |
| * we reuse the executor timeout thread for this special case. |
| * |
| * The assumption is that procedure is used as hook to dispatch other procedures |
| * or trigger some cleanups. It does not store state in the ProcedureStore. |
| * this is just for in-memory chore executions. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public abstract class ProcedureInMemoryChore<TEnvironment> extends Procedure<TEnvironment> { |
| protected ProcedureInMemoryChore(final int timeoutMsec) { |
| setTimeout(timeoutMsec); |
| } |
| |
| protected abstract void periodicExecute(final TEnvironment env); |
| |
| @Override |
| protected Procedure<TEnvironment>[] execute(final TEnvironment env) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| protected void rollback(final TEnvironment env) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| protected boolean abort(final TEnvironment env) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| protected void serializeStateData(ProcedureStateSerializer serializer) |
| throws IOException { |
| } |
| |
| @Override |
| protected void deserializeStateData(ProcedureStateSerializer serializer) |
| throws IOException { |
| } |
| } |