package com.alibaba.jstorm.callback.impl;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
import backtype.storm.Config;
import clojure.lang.IFn.OLD;
import com.alibaba.jstorm.callback.BaseCallback;
import com.alibaba.jstorm.cluster.StormConfig;
import com.alibaba.jstorm.cluster.StormStatus;
import com.alibaba.jstorm.daemon.nimbus.NimbusData;
import com.alibaba.jstorm.daemon.nimbus.StatusType;
import com.alibaba.jstorm.schedule.DelayEventRunnable;
import com.alibaba.jstorm.utils.JStormUtils;
/**
*
*
* The action when nimbus receive kill command 1. set the topology status as
* target 2. wait 2 * Timeout seconds later, do removing topology from ZK
*
* @author Longda
*/
public class DelayStatusTransitionCallback extends BaseCallback {
private static Logger LOG = Logger.getLogger(DelayStatusTransitionCallback.class);
public static final int DEFAULT_DELAY_SECONDS = 30;
protected NimbusData data;
protected String topologyid;
protected StormStatus oldStatus;
protected StatusType newType;
protected StatusType nextAction;
public DelayStatusTransitionCallback(NimbusData data,
String topologyid,
StormStatus oldStatus,
StatusType newType,
StatusType nextAction) {
this.data = data;
this.topologyid = topologyid;
this.oldStatus = oldStatus;
this.newType = newType;
this.nextAction = nextAction;
}
public int getDelaySeconds(Object[] args) {
if (oldStatus != null && oldStatus.getDelaySecs() > 0) {
return oldStatus.getDelaySecs();
}
Integer delaySecs = DelayStatusTransitionCallback.DEFAULT_DELAY_SECONDS;
if (args == null || args.length == 0 || args[0] == null) {
Map<?, ?> map = null;
try {
map = StormConfig.read_nimbus_topology_conf(data.getConf(),
topologyid);
delaySecs = JStormUtils.parseInt(
map.get(Config.TOPOLOGY_MESSAGE_TIMEOUT_SECS),
DEFAULT_DELAY_SECONDS);
} catch (Exception e) {
LOG.info("Failed to get topology configuration " + topologyid);
}
} else {
delaySecs = JStormUtils.parseInt(args[0]);
}
if (delaySecs == null || delaySecs <= 0) {
delaySecs = DelayStatusTransitionCallback.DEFAULT_DELAY_SECONDS;
}
return delaySecs;
}
@Override
public <T> Object execute(T... args) {
int delaySecs = getDelaySeconds(args);
LOG.info("Delaying event " + newType + " for "
+ delaySecs + " secs for " + topologyid);
data.getScheduExec().schedule(
new DelayEventRunnable(data, topologyid, nextAction),
delaySecs, TimeUnit.SECONDS);
return new StormStatus(delaySecs, newType);
}
}