CompactionTaskManager (IoTDB Server 0.13.2 API)

java.lang.Object
- org.apache.iotdb.db.engine.compaction.CompactionTaskManager

所有已实现的接口:

IService
```
public class CompactionTaskManager
extends Object
implements IService
```
CompactionMergeTaskPoolManager provides a ThreadPool tPro queue and run all compaction tasks.

字段概要

字段
限定符和类型字段和说明

static AtomicInteger currentTaskNum

字段
限定符和类型	字段和说明
`static AtomicInteger`	`currentTaskNum`

构造器概要

构造器
构造器和说明

CompactionTaskManager()

构造器
构造器和说明
`CompactionTaskManager()`

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`void`	`abortCompaction(String fullStorageGroupName)` Abort all compactions of a storage group.
`boolean`	`addTaskToWaitingQueue(AbstractCompactionTask compactionTask)` This method submit the compaction task to the PriorityQueue in CompactionTaskManager.
`void`	`clearCandidateQueue()`
`int`	`getExecutingTaskCount()`
`long`	`getFinishTaskNum()`
`ServiceType`	`getID()` Get the name of the the service.
`static CompactionTaskManager`	`getInstance()`
`com.google.common.util.concurrent.RateLimiter`	`getMergeWriteRateLimiter()`
`List<AbstractCompactionTask>`	`getRunningCompactionTaskList()`
`int`	`getTotalTaskCount()`
`static void`	`mergeRateLimiterAcquire(com.google.common.util.concurrent.RateLimiter limiter, long bytesLength)` wait by throughoutMbPerSec limit to avoid continuous Write Or Read
`void`	`removeRunningTaskFromList(AbstractCompactionTask task)`
`void`	`restart()`
`void`	`start()` Start current service.
`void`	`stop()` Stop current service.
`Future<Void>`	`submitSubTask(Callable<Void> subCompactionTask)`
`Future<CompactionTaskSummary>`	`submitTask(Callable<CompactionTaskSummary> compactionMergeTask)` This method will directly submit a task to thread pool if there is available thread.
`void`	`submitTaskFromTaskQueue()` This method will submit task cached in queue with most priority to execution thread pool if there is available thread.
`void`	`waitAllCompactionFinish()`
`void`	`waitAndStop(long milliseconds)`

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.apache.iotdb.db.service.IService
shutdown

- 字段详细资料
  - currentTaskNum
```
public static volatile AtomicInteger currentTaskNum
```
- 构造器详细资料
  - CompactionTaskManager
```
public CompactionTaskManager()
```
- 方法详细资料
  - getInstance
```
public static CompactionTaskManager getInstance()
```
  - start
```
public void start()
```
    从接口复制的说明: IService
    
    Start current service.
    
    指定者:
    
    start 在接口中 IService
  - stop
```
public void stop()
```
    从接口复制的说明: IService
    
    Stop current service. If current service uses thread or thread pool, current service should guarantee to putBack thread or thread pool.
    
    指定者:
    
    stop 在接口中 IService
  - waitAndStop
```
public void waitAndStop(long milliseconds)
```
    指定者:
    
    waitAndStop 在接口中 IService
  - waitAllCompactionFinish
```
public void waitAllCompactionFinish()
```
  - getID
```
public ServiceType getID()
```
    从接口复制的说明: IService
    
    Get the name of the the service.
    
    指定者:
    
    getID 在接口中 IService
    
    返回:
    
    current service name
  - addTaskToWaitingQueue
```
public boolean addTaskToWaitingQueue(AbstractCompactionTask compactionTask)
                              throws InterruptedException
```
    This method submit the compaction task to the PriorityQueue in CompactionTaskManager. Notice! The task will not be submitted immediately. If the queue size is larger than max size, the task with last priority will be removed from the task.
    
    抛出:
    
    InterruptedException
  - submitTaskFromTaskQueue
```
public void submitTaskFromTaskQueue()
```
    This method will submit task cached in queue with most priority to execution thread pool if there is available thread.
  - getMergeWriteRateLimiter
```
public com.google.common.util.concurrent.RateLimiter getMergeWriteRateLimiter()
```
  - mergeRateLimiterAcquire
```
public static void mergeRateLimiterAcquire(com.google.common.util.concurrent.RateLimiter limiter,
                                           long bytesLength)
```
    wait by throughoutMbPerSec limit to avoid continuous Write Or Read
  - removeRunningTaskFromList
```
public void removeRunningTaskFromList(AbstractCompactionTask task)
```
  - submitTask
```
public Future<CompactionTaskSummary> submitTask(Callable<CompactionTaskSummary> compactionMergeTask)
                                         throws RejectedExecutionException
```
    This method will directly submit a task to thread pool if there is available thread.
    
    返回:
    
    the future of the task.
    
    抛出:
    
    RejectedExecutionException
  - submitSubTask
```
public Future<Void> submitSubTask(Callable<Void> subCompactionTask)
```
  - abortCompaction
```
public void abortCompaction(String fullStorageGroupName)
```
    Abort all compactions of a storage group. The caller must acquire the write lock of the corresponding storage group.
  - getExecutingTaskCount
```
public int getExecutingTaskCount()
```
  - getTotalTaskCount
```
public int getTotalTaskCount()
```
  - getRunningCompactionTaskList
```
public List<AbstractCompactionTask> getRunningCompactionTaskList()
```
  - getFinishTaskNum
```
public long getFinishTaskNum()
```
  - restart
```
public void restart()
             throws InterruptedException
```
    抛出:
    
    InterruptedException
  - clearCandidateQueue
```
public void clearCandidateQueue()
```

类 CompactionTaskManager

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 org.apache.iotdb.db.service.IService

字段详细资料

currentTaskNum

构造器详细资料

CompactionTaskManager

方法详细资料

getInstance

start

stop

waitAndStop

waitAllCompactionFinish

getID

addTaskToWaitingQueue

submitTaskFromTaskQueue

getMergeWriteRateLimiter

mergeRateLimiterAcquire

removeRunningTaskFromList

submitTask

submitSubTask

abortCompaction

getExecutingTaskCount

getTotalTaskCount

getRunningCompactionTaskList

getFinishTaskNum

restart

clearCandidateQueue