third_party/tmb/src/java/DeleteMessages.java

/**
 * 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 tmb.voltdb;

import org.voltdb.*;

public class DeleteMessages extends VoltProcedure {
  public final SQLStmt deleteQueuedMessageSQL = new SQLStmt(
      "DELETE FROM queued_message WHERE receiver_id = ? AND message_id = ?");
  public final SQLStmt deleteExpiredMessagesSQL = new SQLStmt(
      "DELETE FROM queued_message WHERE NOW > expiration_time;");

  public long run(int receiver_id,
                  long[] message_ids) throws VoltAbortException {
    for (long message_id : message_ids) {
      voltQueueSQL(deleteQueuedMessageSQL, receiver_id, message_id);
    }
    // Delete all expired messages in this partition while we're at it.
    voltQueueSQL(deleteExpiredMessagesSQL);
    voltExecuteSQL();
    return 0;
  }
}