| /* |
| * 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.twill.internal.state; |
| |
| import ch.qos.logback.classic.Logger; |
| import com.google.common.base.Functions; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Maps; |
| import org.apache.twill.api.Command; |
| import org.apache.twill.api.logging.LogEntry; |
| |
| import java.util.Map; |
| import java.util.Set; |
| import javax.annotation.Nullable; |
| |
| /** |
| * Collection of predefined system messages. |
| */ |
| public final class SystemMessages { |
| |
| public static final String SET_LOG_LEVEL = "setLogLevels"; |
| public static final String RESET_LOG_LEVEL = "resetLogLevels"; |
| public static final Command STOP_COMMAND = Command.Builder.of("stop").build(); |
| public static final Message SECURE_STORE_UPDATED = new SimpleMessage( |
| Message.Type.SYSTEM, Message.Scope.APPLICATION, null, Command.Builder.of("secureStoreUpdated").build()); |
| |
| public static Message stopApplication() { |
| return new SimpleMessage(Message.Type.SYSTEM, Message.Scope.APPLICATION, null, STOP_COMMAND); |
| } |
| |
| public static Message stopRunnable(String runnableName) { |
| return new SimpleMessage(Message.Type.SYSTEM, Message.Scope.RUNNABLE, runnableName, STOP_COMMAND); |
| } |
| |
| public static Message setInstances(String runnableName, int instances) { |
| Preconditions.checkArgument(instances > 0, "Instances should be > 0."); |
| return new SimpleMessage(Message.Type.SYSTEM, Message.Scope.RUNNABLE, runnableName, |
| Command.Builder.of("instances").addOption("count", Integer.toString(instances)).build()); |
| } |
| |
| /** |
| * Helper method to get System {@link Message} for update instances for a runnable. |
| * |
| * @param updateCommand The {@link Command} to be added to the message. |
| * @param runnableName The name of the runnable to be restarted. |
| * @return An instance of System {@link Message} to restart runnable instances. |
| */ |
| public static Message updateRunnableInstances(Command updateCommand, String runnableName) { |
| Preconditions.checkNotNull(updateCommand); |
| Preconditions.checkNotNull(runnableName); |
| return new SimpleMessage(Message.Type.SYSTEM, Message.Scope.RUNNABLE, runnableName, updateCommand); |
| } |
| |
| /** |
| * Helper method to get System {@link Message} for restarting certain instances from certain runnables. |
| * |
| * @param updateCommand The {@link Command} to be added to the message. |
| * @return An instance of System {@link Message} to restart runnables' instances. |
| */ |
| public static Message updateRunnablesInstances(Command updateCommand) { |
| Preconditions.checkNotNull(updateCommand); |
| return new SimpleMessage(Message.Type.SYSTEM, Message.Scope.RUNNABLES, null, updateCommand); |
| } |
| |
| /** |
| * Helper method to get System {@link Message} for updating the log levels for all runnables. |
| * |
| * @param logLevels The log levels to be updated. |
| * @return An instance of System {@link Message} to update the log levels. |
| */ |
| public static Message updateLogLevels(Map<String, LogEntry.Level> logLevels) { |
| return updateLogLevels(null, logLevels); |
| } |
| |
| /** |
| * Helper method to get System {@link Message} for updating the log levels for one or all runnables. |
| * |
| * @param runnableName The name of the runnable to update the log level, null if apply to all runnables. |
| * @param logLevels The log levels to be updated. |
| * @return An instance of System {@link Message} to update the log levels. |
| */ |
| public static Message updateLogLevels(@Nullable String runnableName, Map<String, LogEntry.Level> logLevels) { |
| Preconditions.checkNotNull(logLevels); |
| Preconditions.checkArgument(!(logLevels.containsKey(Logger.ROOT_LOGGER_NAME) |
| && logLevels.get(Logger.ROOT_LOGGER_NAME) == null)); |
| Map<String, String> options = convertLogEntryToString(logLevels); |
| return new SimpleMessage(Message.Type.SYSTEM, |
| runnableName == null ? Message.Scope.ALL_RUNNABLE : Message.Scope.RUNNABLE, |
| runnableName, Command.Builder.of(SET_LOG_LEVEL).addOptions(options).build()); |
| } |
| |
| /** |
| * Helper method to get System {@link Message} for resetting the log levels for all runnables. |
| */ |
| public static Message resetLogLevels(Set<String> loggerNames) { |
| return resetLogLevels(null, loggerNames); |
| } |
| |
| /** |
| * Helper method to get System {@link Message} for resetting log levels for one or all runnables. |
| * |
| * @param runnableName The name of the runnable to set the log level, null if apply to all runnables. |
| * @return An instance of System {@link Message} to reset the log levels. |
| */ |
| public static Message resetLogLevels(@Nullable String runnableName, Set<String> loggerNames) { |
| return new SimpleMessage(Message.Type.SYSTEM, |
| runnableName == null ? Message.Scope.ALL_RUNNABLE : Message.Scope.RUNNABLE, |
| runnableName, Command.Builder.of(RESET_LOG_LEVEL) |
| .addOptions(Maps.uniqueIndex(loggerNames, Functions.toStringFunction())).build()); |
| } |
| |
| private static Map<String, String> convertLogEntryToString(Map<String, LogEntry.Level> logLevels) { |
| return Maps.transformEntries(logLevels, new Maps.EntryTransformer<String, LogEntry.Level, String>() { |
| @Override |
| public String transformEntry(String loggerName, LogEntry.Level level) { |
| return level == null ? null : level.name(); |
| } |
| }); |
| } |
| |
| private SystemMessages() { |
| } |
| } |