| /* |
| * 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.samza.coordinator.stream; |
| |
| import com.google.common.base.Preconditions; |
| import java.util.Map; |
| import org.apache.samza.coordinator.stream.messages.CoordinatorStreamMessage; |
| import org.apache.samza.coordinator.stream.messages.SetChangelogMapping; |
| import org.apache.samza.coordinator.stream.messages.SetContainerHostMapping; |
| import org.apache.samza.coordinator.stream.messages.SetTaskContainerMapping; |
| import org.apache.samza.coordinator.stream.messages.SetConfig; |
| import org.apache.samza.coordinator.stream.messages.SetTaskPartitionMapping; |
| import org.apache.samza.SamzaException; |
| import org.apache.samza.coordinator.stream.messages.SetTaskModeMapping; |
| import org.apache.samza.serializers.JsonSerde; |
| import org.apache.samza.serializers.Serde; |
| |
| /** |
| * Serializer for values written into the coordinator stream. |
| */ |
| public class CoordinatorStreamValueSerde implements Serde<String> { |
| |
| private static final String SOURCE = "SamzaContainer"; |
| |
| private final String type; |
| private final Serde<Map<String, Object>> messageSerde; |
| |
| public CoordinatorStreamValueSerde(String type) { |
| Preconditions.checkNotNull(type); |
| this.type = type; |
| messageSerde = new JsonSerde<>(); |
| } |
| |
| @Override |
| public String fromBytes(byte[] bytes) { |
| Map<String, Object> values = messageSerde.fromBytes(bytes); |
| CoordinatorStreamMessage message = new CoordinatorStreamMessage(new Object[]{}, values); |
| if (type.equalsIgnoreCase(SetContainerHostMapping.TYPE)) { |
| SetContainerHostMapping hostMapping = new SetContainerHostMapping(message); |
| return hostMapping.getHostLocality(); |
| } else if (type.equalsIgnoreCase(SetTaskContainerMapping.TYPE)) { |
| SetTaskContainerMapping setTaskContainerMapping = new SetTaskContainerMapping(message); |
| return setTaskContainerMapping.getTaskAssignment(); |
| } else if (type.equalsIgnoreCase(SetChangelogMapping.TYPE)) { |
| SetChangelogMapping changelogMapping = new SetChangelogMapping(message); |
| return (changelogMapping.getPartition() != null) ? String.valueOf(changelogMapping.getPartition()) : null; |
| } else if (type.equalsIgnoreCase(SetConfig.TYPE)) { |
| SetConfig setConfig = new SetConfig(message); |
| return setConfig.getConfigValue(); |
| } else if (type.equalsIgnoreCase(SetTaskModeMapping.TYPE)) { |
| SetTaskModeMapping setTaskModeMapping = new SetTaskModeMapping(message); |
| return String.valueOf(setTaskModeMapping.getTaskMode()); |
| } else if (type.equalsIgnoreCase(SetTaskPartitionMapping.TYPE)) { |
| SetTaskPartitionMapping setTaskPartitionMapping = new SetTaskPartitionMapping(message); |
| return setTaskPartitionMapping.getTaskNames(); |
| } else { |
| throw new SamzaException(String.format("Unknown coordinator stream message type: %s", type)); |
| } |
| } |
| |
| @Override |
| public byte[] toBytes(String value) { |
| if (type.equalsIgnoreCase(SetContainerHostMapping.TYPE)) { |
| SetContainerHostMapping hostMapping = new SetContainerHostMapping(SOURCE, "", value, "", ""); |
| return messageSerde.toBytes(hostMapping.getMessageMap()); |
| } else if (type.equalsIgnoreCase(SetTaskContainerMapping.TYPE)) { |
| SetTaskContainerMapping setTaskContainerMapping = new SetTaskContainerMapping(SOURCE, "", value); |
| return messageSerde.toBytes(setTaskContainerMapping.getMessageMap()); |
| } else if (type.equalsIgnoreCase(SetTaskModeMapping.TYPE)) { |
| SetTaskModeMapping setTaskModeMapping = new SetTaskModeMapping(SOURCE, "", value); |
| return messageSerde.toBytes(setTaskModeMapping.getMessageMap()); |
| } else if (type.equalsIgnoreCase(SetChangelogMapping.TYPE)) { |
| SetChangelogMapping changelogMapping = new SetChangelogMapping(SOURCE, "", Integer.valueOf(value)); |
| return messageSerde.toBytes(changelogMapping.getMessageMap()); |
| } else if (type.equalsIgnoreCase(SetConfig.TYPE)) { |
| SetConfig setConfig = new SetConfig(SOURCE, "", value); |
| return messageSerde.toBytes(setConfig.getMessageMap()); |
| } else if (type.equalsIgnoreCase(SetTaskPartitionMapping.TYPE)) { |
| SetTaskPartitionMapping setTaskPartitionMapping = new SetTaskPartitionMapping(SOURCE, "", value); |
| return messageSerde.toBytes(setTaskPartitionMapping.getMessageMap()); |
| } else { |
| throw new SamzaException(String.format("Unknown coordinator stream message type: %s", type)); |
| } |
| } |
| } |