/*
 * 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.cassandra.db.monitoring;

public abstract class MonitorableImpl implements Monitorable
{
    private MonitoringState state;
    private boolean isSlow;
    private long constructionTime = -1;
    private long timeout;
    private long slowTimeout;
    private boolean isCrossNode;

    protected MonitorableImpl()
    {
        this.state = MonitoringState.IN_PROGRESS;
        this.isSlow = false;
    }

    
This setter is ugly but the construction chain to ReadCommand
is too complex, it would require passing new parameters to all serializers
or specializing the serializers to accept these message properties.
/**
     * This setter is ugly but the construction chain to ReadCommand
     * is too complex, it would require passing new parameters to all serializers
     * or specializing the serializers to accept these message properties.
     */
    public void setMonitoringTime(long constructionTime, boolean isCrossNode, long timeout, long slowTimeout)
    {
        assert constructionTime >= 0;
        this.constructionTime = constructionTime;
        this.isCrossNode = isCrossNode;
        this.timeout = timeout;
        this.slowTimeout = slowTimeout;
    }

    public long constructionTime()
    {
        return constructionTime;
    }

    public long timeout()
    {
        return timeout;
    }

    public boolean isCrossNode()
    {
        return isCrossNode;
    }

    public long slowTimeout()
    {
        return slowTimeout;
    }

    public boolean isInProgress()
    {
        check();
        return state == MonitoringState.IN_PROGRESS;
    }

    public boolean isAborted()
    {
        check();
        return state == MonitoringState.ABORTED;
    }

    public boolean isCompleted()
    {
        check();
        return state == MonitoringState.COMPLETED;
    }

    public boolean isSlow()
    {
        check();
        return isSlow;
    }

    public boolean abort()
    {
        if (state == MonitoringState.IN_PROGRESS)
        {
            if (constructionTime >= 0)
                MonitoringTask.addFailedOperation(this, ApproximateTime.currentTimeMillis());

            state = MonitoringState.ABORTED;
            return true;
        }

        return state == MonitoringState.ABORTED;
    }

    public boolean complete()
    {
        if (state == MonitoringState.IN_PROGRESS)
        {
            if (isSlow && slowTimeout > 0 && constructionTime >= 0)
                MonitoringTask.addSlowOperation(this, ApproximateTime.currentTimeMillis());

            state = MonitoringState.COMPLETED;
            return true;
        }

        return state == MonitoringState.COMPLETED;
    }

    private void check()
    {
        if (constructionTime < 0 || state != MonitoringState.IN_PROGRESS)
            return;

        long elapsed = ApproximateTime.currentTimeMillis() - constructionTime;

        if (elapsed >= slowTimeout && !isSlow)
            isSlow = true;

        if (elapsed >= timeout)
            abort();
    }
}