| /* |
| * 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.geode.internal.process; |
| |
| import static org.apache.commons.lang3.Validate.notNull; |
| |
| import java.util.Properties; |
| |
| import org.apache.geode.distributed.internal.DistributionConfig; |
| |
| /** |
| * Thread based context for launching a process. GemFire internals can acquire optional |
| * configuration details from a process launcher via this context. |
| * |
| * @since GemFire 7.0 |
| */ |
| public class ProcessLauncherContext { |
| |
| public static final String OVERRIDDEN_DEFAULTS_PREFIX = |
| DistributionConfig.GEMFIRE_PREFIX + "default."; |
| |
| /** |
| * Default value for {@link #isRedirectingOutput()} |
| */ |
| private static final boolean REDIRECT_OUTPUT_DEFAULT = false; |
| |
| private static final ThreadLocal<ProcessLauncherContext> DATA = new ThreadLocal<>(); |
| |
| private final boolean redirectOutput; |
| private final Properties overriddenDefaults; |
| private final StartupStatusListener startupListener; |
| |
| private static ProcessLauncherContext get() { |
| return DATA.get(); |
| } |
| |
| /** |
| * Returns true if this process should redirect output to the system log. |
| * |
| * @return true if this process should redirect output to the system log |
| */ |
| public static boolean isRedirectingOutput() { |
| ProcessLauncherContext context = get(); |
| if (context == null) { |
| return REDIRECT_OUTPUT_DEFAULT; |
| } |
| return context.redirectOutput(); |
| } |
| |
| /** |
| * Returns the gemfire properties to be used if none of the specified properties are defined by |
| * any other mechanism. This will only override default values. If a property is defined by System |
| * property, API, or within gemfire.properties then the contingent value will be ignored. |
| * |
| * @return the contingent gemfire properties values to be used as an alternative default value |
| */ |
| public static Properties getOverriddenDefaults() { |
| ProcessLauncherContext context = get(); |
| if (context == null) { |
| return new Properties(); |
| } |
| return context.overriddenDefaults(); |
| } |
| |
| public static StartupStatusListener getStartupListener() { |
| ProcessLauncherContext context = get(); |
| if (context == null) { |
| return null; |
| } |
| |
| return context.startupListener(); |
| } |
| |
| /** |
| * Sets the ProcessLauncherContext data for the calling thread. |
| */ |
| public static void set(final boolean redirectOutput, final Properties overriddenDefaults, |
| final StartupStatusListener startupListener) { |
| notNull(overriddenDefaults, |
| "Invalid overriddenDefaults '" + overriddenDefaults + "' specified"); |
| |
| DATA.set(new ProcessLauncherContext(redirectOutput, overriddenDefaults, startupListener)); |
| installLogListener(startupListener); |
| } |
| |
| /** |
| * Clears the current ProcessLauncherContext for the calling thread. |
| */ |
| public static void remove() { |
| DATA.remove(); |
| clearLogListener(); |
| } |
| |
| private static void installLogListener(final StartupStatusListener startupListener) { |
| if (startupListener != null) { |
| StartupStatus.setListener(startupListener); |
| } |
| } |
| |
| private static void clearLogListener() { |
| StartupStatus.clearListener(); |
| } |
| |
| private ProcessLauncherContext(final boolean redirectOutput, final Properties overriddenDefaults, |
| final StartupStatusListener startupListener) { |
| this.redirectOutput = redirectOutput; |
| this.overriddenDefaults = overriddenDefaults; |
| this.startupListener = startupListener; |
| } |
| |
| private boolean redirectOutput() { |
| return redirectOutput; |
| } |
| |
| private Properties overriddenDefaults() { |
| return overriddenDefaults; |
| } |
| |
| private StartupStatusListener startupListener() { |
| return startupListener; |
| } |
| } |