SegmentReloadMessage.java example

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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 com.linkedin.pinot.common.messages;

import com.google.common.base.Preconditions;
import java.util.UUID;
import org.apache.helix.model.Message;


/**
 * This Helix message is sent from the controller to the servers when a request is received to reload an existing
 * segment.
 */
public class SegmentReloadMessage extends Message {
  public static final String RELOAD_SEGMENT_MSG_SUB_TYPE = "RELOAD_SEGMENT";

  public SegmentReloadMessage(String tableName, String segmentName) {
    super(MessageType.USER_DEFINE_MSG, UUID.randomUUID().toString());
    setResourceName(tableName);
    setPartitionName(segmentName);
    setMsgSubType(RELOAD_SEGMENT_MSG_SUB_TYPE);
    // Give it infinite time to process the message, as long as session is alive
    setExecutionTimeout(-1);
  }

  public SegmentReloadMessage(Message message) {
    super(message.getRecord());
    String msgSubType = message.getMsgSubType();
    Preconditions.checkArgument(msgSubType.equals(RELOAD_SEGMENT_MSG_SUB_TYPE),
        "Invalid message sub type: " + msgSubType + " for SegmentReloadMessage");
  }
}