| /* |
| * 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.ignite.internal.processors.igfs; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.IgniteLogger; |
| |
| /** |
| * Abstract class for IGFS managers. |
| */ |
| public abstract class IgfsManager { |
| /** IGFS context. */ |
| protected IgfsContext igfsCtx; |
| |
| /** Logger. */ |
| protected IgniteLogger log; |
| |
| /** Starting flag. */ |
| private AtomicBoolean starting = new AtomicBoolean(); |
| |
| /** |
| * Called when IGFS processor is started. |
| * |
| * @param igfsCtx IGFS context. |
| */ |
| public void start(IgfsContext igfsCtx) throws IgniteCheckedException { |
| if (!starting.compareAndSet(false, true)) |
| assert false : "Method start is called more than once for manager: " + this; |
| |
| assert igfsCtx != null; |
| |
| this.igfsCtx = igfsCtx; |
| |
| log = igfsCtx.kernalContext().log(getClass()); |
| |
| start0(); |
| |
| if (log != null && log.isDebugEnabled()) |
| log.debug(startInfo()); |
| } |
| |
| /** |
| * Stops manager. |
| * |
| * @param cancel Cancel flag. |
| */ |
| public final void stop(boolean cancel) { |
| if (!starting.get()) |
| // Ignoring attempt to stop manager that has never been started. |
| return; |
| |
| stop0(cancel); |
| |
| if (log != null && log.isDebugEnabled()) |
| log.debug(stopInfo()); |
| } |
| |
| /** |
| * @throws IgniteCheckedException If failed. |
| */ |
| public final void onKernalStart() throws IgniteCheckedException { |
| onKernalStart0(); |
| |
| if (log != null && log.isDebugEnabled()) |
| log.debug(kernalStartInfo()); |
| } |
| |
| /** |
| * @param cancel Cancel flag. |
| */ |
| public final void onKernalStop(boolean cancel) { |
| if (!starting.get()) |
| // Ignoring attempt to stop manager that has never been started. |
| return; |
| |
| onKernalStop0(cancel); |
| |
| if (log != null && log.isDebugEnabled()) |
| log.debug(kernalStopInfo()); |
| } |
| |
| /** |
| * Start manager implementation. |
| */ |
| protected void start0() throws IgniteCheckedException { |
| // No-op by default. |
| } |
| |
| /** |
| * Stop manager implementation. |
| * |
| * @param cancel Cancel flag. |
| */ |
| protected void stop0(boolean cancel) { |
| // No-op by default. |
| } |
| |
| /** |
| * @throws IgniteCheckedException If failed. |
| */ |
| protected void onKernalStart0() throws IgniteCheckedException { |
| // No-op. |
| } |
| |
| /** |
| * |
| */ |
| protected void onKernalStop0(boolean cancel) { |
| // No-op. |
| } |
| |
| /** |
| * @return Start info. |
| */ |
| protected String startInfo() { |
| return "Cache manager started: " + getClass().getSimpleName(); |
| } |
| |
| /** |
| * @return Stop info. |
| */ |
| protected String stopInfo() { |
| return "Cache manager stopped: " + getClass().getSimpleName(); |
| } |
| |
| /** |
| * @return Start info. |
| */ |
| protected String kernalStartInfo() { |
| return "Cache manager received onKernalStart() callback: " + getClass().getSimpleName(); |
| } |
| |
| /** |
| * @return Stop info. |
| */ |
| protected String kernalStopInfo() { |
| return "Cache manager received onKernalStop() callback: " + getClass().getSimpleName(); |
| } |
| } |