DriverQueryCommand.java

/*
 * Copyright 2013 Eediom Inc.
 * 
 * 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 org.araqne.logdb;

public abstract class DriverQueryCommand extends QueryCommand {

	protected QueryTask task = new ScanTask();

	@Override
	public QueryTask getMainTask() {
		// support optional driver mode
		return isDriver() ? task : null;
	}

	@Override
	public boolean isDriver() {
		return true;
	}

	public abstract void run();

	private class ScanTask extends QueryTask {

		@Override
		public void run() {
			DriverQueryCommand.this.run();
		}

		@Override
		public String toString() {
			String queryId = getQuery() != null ? Integer.toString(getQuery().getId()) : "null";
			return "query: " + queryId + " scan: " + DriverQueryCommand.this.toString();
		}
	}
}