FifoRpcScheduler (Apache HBase

java.lang.Object
- org.apache.hadoop.hbase.ipc.RpcScheduler
- - org.apache.hadoop.hbase.ipc.FifoRpcScheduler

直接已知子类:

MasterFifoRpcScheduler
```
@InterfaceAudience.Private
public class FifoRpcScheduler
extends RpcScheduler
```
A very simple RpcScheduler} that serves incoming requests in order. This can be used for HMaster, where no prioritization is needed.

嵌套类概要
- 从类继承的嵌套类/接口 org.apache.hadoop.hbase.ipc.RpcScheduler
  RpcScheduler.Context

字段概要

字段
限定符和类型字段和说明

protected ThreadPoolExecutor executor

protected int handlerCount

protected int maxQueueLength

protected AtomicInteger queueSize
- 从类继承的字段 org.apache.hadoop.hbase.ipc.RpcScheduler
  IPC_SERVER_MAX_CALLQUEUE_LENGTH, IPC_SERVER_PRIORITY_MAX_CALLQUEUE_LENGTH

字段
限定符和类型	字段和说明
`protected ThreadPoolExecutor`	`executor`
`protected int`	`handlerCount`
`protected int`	`maxQueueLength`
`protected AtomicInteger`	`queueSize`

构造器概要

构造器
构造器和说明

FifoRpcScheduler(org.apache.hadoop.conf.Configuration conf, int handlerCount)

构造器
构造器和说明
`FifoRpcScheduler(org.apache.hadoop.conf.Configuration conf, int handlerCount)`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`boolean`	`dispatch(CallRunner task)` Dispatches an RPC request asynchronously.
`protected boolean`	`executeRpcCall(ThreadPoolExecutor executor, AtomicInteger queueSize, CallRunner task)`
`int`	`getActiveReadRpcHandlerCount()` Retrieves the number of active write rpc handler when use RWQueueRpcExecutor.
`int`	`getActiveRpcHandlerCount()` Retrieves the number of active handler.
`int`	`getActiveScanRpcHandlerCount()` Retrieves the number of active write rpc handler when use RWQueueRpcExecutor.
`int`	`getActiveWriteRpcHandlerCount()` Retrieves the number of active write rpc handler when use RWQueueRpcExecutor.
`protected String`	`getCallMethod(CallRunner task)`
`CallQueueInfo`	`getCallQueueInfo()` Get call queue information
`int`	`getGeneralQueueLength()` Retrieves length of the general queue for metrics.
`int`	`getMetaPriorityQueueLength()` Retrieves length of the meta priority queue for metrics.
`long`	`getNumGeneralCallsDropped()` If CoDel-based RPC executors are used, retrieves the number of Calls that were dropped from general queue because RPC executor is under high load; returns 0 otherwise.
`long`	`getNumLifoModeSwitches()` If CoDel-based RPC executors are used, retrieves the number of Calls that were picked from the tail of the queue (indicating adaptive LIFO mode, when in the period of overloade we serve last requests first); returns 0 otherwise.
`int`	`getPriorityQueueLength()` Retrieves length of the priority queue for metrics.
`int`	`getReadQueueLength()` Retrieves length of the read queue for metrics when use RWQueueRpcExecutor.
`int`	`getReplicationQueueLength()` Retrieves length of the replication queue for metrics.
`int`	`getScanQueueLength()` Retrieves length of the scan queue for metrics when use RWQueueRpcExecutor.
`int`	`getWriteQueueLength()` Retrieves length of the write queue for metrics when use RWQueueRpcExecutor.
`void`	`init(RpcScheduler.Context context)` Does some quick initialization.
`void`	`start()` Prepares for request serving.
`void`	`stop()` Stops serving new requests.
`protected void`	`updateMethodCountAndSizeByQueue(BlockingQueue<Runnable> queue, HashMap<String,Long> methodCount, HashMap<String,Long> methodSize)`

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

- 字段详细资料
  - handlerCount
```
protected final int handlerCount
```
  - maxQueueLength
```
protected final int maxQueueLength
```
  - queueSize
```
protected final AtomicInteger queueSize
```
  - executor
```
protected ThreadPoolExecutor executor
```
- 构造器详细资料
  - FifoRpcScheduler
```
public FifoRpcScheduler(org.apache.hadoop.conf.Configuration conf,
                        int handlerCount)
```
- 方法详细资料
  - init
```
public void init(RpcScheduler.Context context)
```
    从类复制的说明: RpcScheduler
    
    Does some quick initialization. Heavy tasks (e.g. starting threads) should be done in RpcScheduler.start(). This method is called before start.
    
    指定者:
    
    init 在类中 RpcScheduler
    
    参数:
    
    context - provides methods to retrieve runtime information from
  - start
```
public void start()
```
    从类复制的说明: RpcScheduler
    
    Prepares for request serving. An implementation may start some handler threads here.
    
    指定者:
    
    start 在类中 RpcScheduler
  - stop
```
public void stop()
```
    从类复制的说明: RpcScheduler
    
    Stops serving new requests.
    
    指定者:
    
    stop 在类中 RpcScheduler
  - dispatch
```
public boolean dispatch(CallRunner task)
                 throws IOException,
                        InterruptedException
```
    从类复制的说明: RpcScheduler
    
    Dispatches an RPC request asynchronously. An implementation is free to choose to process the request immediately or delay it for later processing.
    
    指定者:
    
    dispatch 在类中 RpcScheduler
    
    参数:
    
    task - the request to be dispatched
    
    抛出:
    
    IOException
    
    InterruptedException
  - executeRpcCall
```
protected boolean executeRpcCall(ThreadPoolExecutor executor,
                                 AtomicInteger queueSize,
                                 CallRunner task)
```
  - getGeneralQueueLength
```
public int getGeneralQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the general queue for metrics.
    
    指定者:
    
    getGeneralQueueLength 在类中 RpcScheduler
  - getPriorityQueueLength
```
public int getPriorityQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the priority queue for metrics.
    
    指定者:
    
    getPriorityQueueLength 在类中 RpcScheduler
  - getReplicationQueueLength
```
public int getReplicationQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the replication queue for metrics.
    
    指定者:
    
    getReplicationQueueLength 在类中 RpcScheduler
  - getActiveRpcHandlerCount
```
public int getActiveRpcHandlerCount()
```
    从类复制的说明: RpcScheduler
    
    Retrieves the number of active handler.
    
    指定者:
    
    getActiveRpcHandlerCount 在类中 RpcScheduler
  - getNumGeneralCallsDropped
```
public long getNumGeneralCallsDropped()
```
    从类复制的说明: RpcScheduler
    
    If CoDel-based RPC executors are used, retrieves the number of Calls that were dropped from general queue because RPC executor is under high load; returns 0 otherwise.
    
    指定者:
    
    getNumGeneralCallsDropped 在类中 RpcScheduler
  - getNumLifoModeSwitches
```
public long getNumLifoModeSwitches()
```
    从类复制的说明: RpcScheduler
    
    If CoDel-based RPC executors are used, retrieves the number of Calls that were picked from the tail of the queue (indicating adaptive LIFO mode, when in the period of overloade we serve last requests first); returns 0 otherwise.
    
    指定者:
    
    getNumLifoModeSwitches 在类中 RpcScheduler
  - getWriteQueueLength
```
public int getWriteQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the write queue for metrics when use RWQueueRpcExecutor.
    
    指定者:
    
    getWriteQueueLength 在类中 RpcScheduler
  - getReadQueueLength
```
public int getReadQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the read queue for metrics when use RWQueueRpcExecutor.
    
    指定者:
    
    getReadQueueLength 在类中 RpcScheduler
  - getScanQueueLength
```
public int getScanQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the scan queue for metrics when use RWQueueRpcExecutor.
    
    指定者:
    
    getScanQueueLength 在类中 RpcScheduler
  - getActiveWriteRpcHandlerCount
```
public int getActiveWriteRpcHandlerCount()
```
    从类复制的说明: RpcScheduler
    
    Retrieves the number of active write rpc handler when use RWQueueRpcExecutor.
    
    指定者:
    
    getActiveWriteRpcHandlerCount 在类中 RpcScheduler
  - getActiveReadRpcHandlerCount
```
public int getActiveReadRpcHandlerCount()
```
    从类复制的说明: RpcScheduler
    
    Retrieves the number of active write rpc handler when use RWQueueRpcExecutor.
    
    指定者:
    
    getActiveReadRpcHandlerCount 在类中 RpcScheduler
  - getActiveScanRpcHandlerCount
```
public int getActiveScanRpcHandlerCount()
```
    从类复制的说明: RpcScheduler
    
    Retrieves the number of active write rpc handler when use RWQueueRpcExecutor.
    
    指定者:
    
    getActiveScanRpcHandlerCount 在类中 RpcScheduler
  - getMetaPriorityQueueLength
```
public int getMetaPriorityQueueLength()
```
    从类复制的说明: RpcScheduler
    
    Retrieves length of the meta priority queue for metrics.
    
    指定者:
    
    getMetaPriorityQueueLength 在类中 RpcScheduler
  - getCallQueueInfo
```
public CallQueueInfo getCallQueueInfo()
```
    从类复制的说明: RpcScheduler
    
    Get call queue information
    
    指定者:
    
    getCallQueueInfo 在类中 RpcScheduler
  - updateMethodCountAndSizeByQueue
```
protected void updateMethodCountAndSizeByQueue(BlockingQueue<Runnable> queue,
                                               HashMap<String,Long> methodCount,
                                               HashMap<String,Long> methodSize)
```
  - getCallMethod
```
protected String getCallMethod(CallRunner task)
```

类 FifoRpcScheduler

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.hbase.ipc.RpcScheduler

字段概要

从类继承的字段 org.apache.hadoop.hbase.ipc.RpcScheduler

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

handlerCount

maxQueueLength

queueSize

executor

构造器详细资料

FifoRpcScheduler

方法详细资料

init

start

stop

dispatch

executeRpcCall

getGeneralQueueLength

getPriorityQueueLength

getReplicationQueueLength

getActiveRpcHandlerCount

getNumGeneralCallsDropped

getNumLifoModeSwitches

getWriteQueueLength

getReadQueueLength

getScanQueueLength

getActiveWriteRpcHandlerCount

getActiveReadRpcHandlerCount

getActiveScanRpcHandlerCount

getMetaPriorityQueueLength

getCallQueueInfo

updateMethodCountAndSizeByQueue

getCallMethod