/**
 * 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 com.alibaba.jstorm.task.execute.spout;

import com.alibaba.jstorm.client.ConfigExtension;
import com.alibaba.jstorm.task.Task;
import com.alibaba.jstorm.task.TaskStatus;
import com.alibaba.jstorm.task.acker.Acker;
import com.alibaba.jstorm.task.comm.TupleInfo;
import com.alibaba.jstorm.utils.JStormUtils;
import com.alibaba.jstorm.utils.RotatingMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * single thread spout executor, all spout msgs will be handled here
 *
 * @author yannian/Longda
 */
public class SingleThreadSpoutExecutors extends SpoutExecutors {
    private static Logger LOG = LoggerFactory.getLogger(SingleThreadSpoutExecutors.class);

    public SingleThreadSpoutExecutors(Task task) {
        super(task);
    }

    @Override
    public void mkPending() {
        // sending Tuple's TimeCacheMap
        if (ConfigExtension.isTaskBatchTuple(storm_conf)) {
            pending = new RotatingMap<>(Acker.TIMEOUT_BUCKET_NUM, null, false);
        } else {
            pending = new RotatingMap<>(Acker.TIMEOUT_BUCKET_NUM, null, true);
        }
    }

    @Override
    public String getThreadName() {
        return idStr + "-" + SingleThreadSpoutExecutors.class.getSimpleName();
    }

    @Override
    public void run() {
        if (!checkTopologyFinishInit) {
            initWrapper();
            int delayRun = ConfigExtension.getSpoutDelayRunSeconds(storm_conf);
            long now = System.currentTimeMillis();
            while (!checkTopologyFinishInit) {
                // wait other bolt is ready, but the spout can handle the received message
                executeEvent();
                controlQueue.consumeBatch(this);
                if (System.currentTimeMillis() - now > delayRun * 1000) {
                    executorStatus.setStatus(TaskStatus.RUN);
                    this.checkTopologyFinishInit = true;
                    LOG.info("wait {} timeout, begin operate nextTuple", delayRun);
                    break;
                }
            }
            while (true) {
                JStormUtils.sleepMs(10);
                if (taskStatus.isRun()) {
                    this.spout.activate();
                    break;
                } else if (taskStatus.isPause()) {
                    this.spout.deactivate();
                    break;
                }
            }
            LOG.info(idStr + " is ready, due to the topology finish init. ");
        }

        executeEvent();
        controlQueue.consumeBatch(this);

        super.nextTuple();

    }

    private void executeEvent() {
        try {
            exeQueue.consumeBatch(this);

        } catch (Exception e) {
            if (!taskStatus.isShutdown()) {
                LOG.error("unknown exception:", e);
            }
        }

    }

}