public abstract class AbstractMongoBolt extends BaseRichBolt
| Modifier and Type | Field and Description |
|---|---|
protected OutputCollector |
collector |
protected MongoDbClient |
mongoClient |
| Constructor and Description |
|---|
AbstractMongoBolt(String url,
String collectionName)
AbstractMongoBolt Constructor.
|
| Modifier and Type | Method and Description |
|---|---|
void |
cleanup()
Called when an IBolt is going to be shutdown.
|
void |
prepare(Map<String,Object> topoConf,
TopologyContext context,
OutputCollector collector)
Called when a task for this component is initialized within a worker on the cluster.
|
getComponentConfigurationclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitdeclareOutputFields, getComponentConfigurationprotected OutputCollector collector
protected MongoDbClient mongoClient
public void prepare(Map<String,Object> topoConf, TopologyContext context, OutputCollector collector)
IBoltCalled when a task for this component is initialized within a worker on the cluster. It provides the bolt with the environment in which the bolt executes.
This includes the:
topoConf - The Storm configuration for this bolt. This is the configuration provided to the topology merged in with cluster configuration on this machine.context - This object can be used to get information about this task’s place within the topology, including the task id and component id of this task, input and output information, etc.collector - The collector is used to emit tuples from this bolt. Tuples can be emitted at any time, including the prepare and cleanup methods. The collector is thread-safe and should be saved as an instance variable of this bolt object.public void cleanup()
IBoltCalled when an IBolt is going to be shutdown. Storm will make a best-effort attempt to call this if the worker shutdown is orderly. The Config.SUPERVISOR_WORKER_SHUTDOWN_SLEEP_SECS setting controls how long orderly shutdown is allowed to take. There is no guarantee that cleanup will be called if shutdown is not orderly, or if the shutdown exceeds the time limit.
The one context where cleanup is guaranteed to be called is when a topology is killed when running Storm in local mode.
cleanup in interface IBoltcleanup in class BaseRichBoltCopyright © 2021 The Apache Software Foundation. All rights reserved.