Package org.apache.storm.utils
Class ShellBoltMessageQueue
java.lang.Object
org.apache.storm.utils.ShellBoltMessageQueue
- All Implemented Interfaces:
- Serializable
A data structure for ShellBolt which includes two queues (FIFO), which one is for task ids (unbounded), another one is for bolt msg
 (bounded).
- See Also:
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionpoll() is a core feature of ShellBoltMessageQueue.voidputBoltMsg(BoltMsg boltMsg) put bolt message to its queue.voidputTaskIds(List<Integer> taskIds) put list of task id to its queue.
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Constructor Details- 
ShellBoltMessageQueuepublic ShellBoltMessageQueue(int boltMsgCapacity) 
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ShellBoltMessageQueuepublic ShellBoltMessageQueue()
 
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Method Details- 
putTaskIdsput list of task id to its queue.- Parameters:
- taskIds- task ids that received the tuples
 
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putBoltMsgput bolt message to its queue.- Parameters:
- boltMsg- BoltMsg to pass to subprocess
- Throws:
- InterruptedException
 
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pollpoll() is a core feature of ShellBoltMessageQueue. It retrieves and removes the head of one queues, waiting up to the specified wait time if necessary for an element to become available. There's priority that what queue it retrieves first, taskIds is higher than boltMsgQueue.- Parameters:
- timeout- how long to wait before giving up, in units of unit
- unit- a TimeUnit determining how to interpret the timeout parameter
- Returns:
- List<Integer>if task id is available, BoltMsg if task id is not available but bolt message is available, null if the specified waiting time elapses before an element is available.
- Throws:
- InterruptedException
 
 
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