DeleteNamespaceProcedure (Apache HBase 1.4.11 API)

java.lang.Object
- org.apache.hadoop.hbase.procedure2.Procedure<TEnvironment>
- - org.apache.hadoop.hbase.procedure2.StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
  - - org.apache.hadoop.hbase.master.procedure.DeleteNamespaceProcedure

All Implemented Interfaces:: Comparable<Procedure>, TableProcedureInterface

@InterfaceAudience.Private
public class DeleteNamespaceProcedure
extends StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
implements TableProcedureInterface

The procedure to remove a namespace.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure
  StateMachineProcedure.Flow
- Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.master.procedure.TableProcedureInterface
  TableProcedureInterface.TableOperationType

Constructor Summary

Constructors
Constructor and Description

DeleteNamespaceProcedure()

DeleteNamespaceProcedure(MasterProcedureEnv env, String namespaceName)

Constructors
Constructor and Description
`DeleteNamespaceProcedure()`
`DeleteNamespaceProcedure(MasterProcedureEnv env, String namespaceName)`

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`abort(MasterProcedureEnv env)` The abort() call is asynchronous and each procedure must decide how to deal with that, if they want to be abortable.
`protected boolean`	`acquireLock(MasterProcedureEnv env)` The user should override this method, and try to take a lock if necessary.
`protected static void`	`deleteDirectory(MasterProcedureEnv env, String namespaceName)` Delete the namespace directories from the file system
`protected static void`	`deleteFromNSTable(MasterProcedureEnv env, String namespaceName)` delete the row from namespace table
`void`	`deserializeStateData(InputStream stream)` Called on store load to allow the user to decode the previously serialized state.
`protected StateMachineProcedure.Flow`	`executeFromState(MasterProcedureEnv env, org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)` called to perform a single step of the specified 'state' of the procedure
`protected org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState`	`getInitialState()` Return the initial state object that will be used for the first call to executeFromState().
`protected org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState`	`getState(int stateId)` Convert an ordinal (or state id) to an Enum (or more descriptive) state object.
`protected int`	`getStateId(org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)` Convert the Enum (or more descriptive) state object to an ordinal (or state id).
`TableName`	`getTableName()`
`TableProcedureInterface.TableOperationType`	`getTableOperationType()` Given an operation type we can take decisions about what to do with pending operations.
`protected void`	`releaseLock(MasterProcedureEnv env)` The user should override this method, and release lock if necessary.
`protected static void`	`removeFromZKNamespaceManager(MasterProcedureEnv env, String namespaceName)` remove from Zookeeper.
`protected static void`	`removeNamespaceQuota(MasterProcedureEnv env, String namespaceName)` remove quota for the namespace
`protected void`	`rollbackState(MasterProcedureEnv env, org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)` called to perform the rollback of the specified state
`void`	`serializeStateData(OutputStream stream)` The user-level code of the procedure may have some state to persist (e.g.
`protected void`	`setNextState(org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)` Set the next state for the procedure.
`void`	`toStringClassDetails(StringBuilder sb)` Extend the toString() information with the procedure details e.g.

Methods inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure
addChildProcedure, execute, isYieldAfterExecutionStep, isYieldBeforeExecuteFromState, rollback, toStringState

Methods inherited from class org.apache.hadoop.hbase.procedure2.Procedure
addStackIndex, beforeReplay, childrenCountDown, compareTo, completionCleanup, convert, convert, createProcedureInfo, doExecute, doRollback, elapsedTime, getException, getLastUpdate, getNonceKey, getOwner, getParentProcId, getProcId, getProcIdHashCode, getResult, getRootProcedureId, getStackIndexes, getStartTime, getState, getTimeout, getTimeRemaining, hasChildren, hasException, hasOwner, hasParent, hasTimeout, incChildrenLatch, isFailed, isFinished, isRunnable, isSuccess, isWaiting, newInstance, removeStackIndex, setAbortFailure, setChildrenLatch, setFailure, setFailure, setNonceKey, setOwner, setParentProcId, setProcId, setResult, setStackIndexes, setStartTime, setState, setTimeout, setTimeoutFailure, shouldWaitClientAck, toString, toStringClass, toStringDetails, toStringSimpleSB, updateTimestamp, validateClass, wasExecuted

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - DeleteNamespaceProcedure
```
public DeleteNamespaceProcedure()
```
  - DeleteNamespaceProcedure
```
public DeleteNamespaceProcedure(MasterProcedureEnv env,
                        String namespaceName)
```
- Method Detail
  - executeFromState
```
protected StateMachineProcedure.Flow executeFromState(MasterProcedureEnv env,
                                          org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)
                                               throws InterruptedException
```
    Description copied from class: StateMachineProcedure
    
    called to perform a single step of the specified 'state' of the procedure
    
    Specified by:
    
    executeFromState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    state - state to execute
    
    Returns:
    Flow.NO_MORE_STATE if the procedure is completed, Flow.HAS_MORE_STATE if there is another step.
    
    Throws:
    
    InterruptedException
  - rollbackState
```
protected void rollbackState(MasterProcedureEnv env,
                 org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)
                      throws IOException
```
    Description copied from class: StateMachineProcedure
    
    called to perform the rollback of the specified state
    
    Specified by:
    
    rollbackState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    state - state to rollback
    
    Throws:
    
    IOException - temporary failure, the rollback will retry later
  - getState
```
protected org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState getState(int stateId)
```
    Description copied from class: StateMachineProcedure
    
    Convert an ordinal (or state id) to an Enum (or more descriptive) state object.
    
    Specified by:
    
    getState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    Parameters:
    stateId - the ordinal() of the state enum (or state id)
    
    Returns:
    the state enum object
  - getStateId
```
protected int getStateId(org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)
```
    Description copied from class: StateMachineProcedure
    
    Convert the Enum (or more descriptive) state object to an ordinal (or state id).
    
    Specified by:
    
    getStateId in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    Parameters:
    state - the state enum object
    
    Returns:
    stateId the ordinal() of the state enum (or state id)
  - getInitialState
```
protected org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState getInitialState()
```
    Description copied from class: StateMachineProcedure
    
    Return the initial state object that will be used for the first call to executeFromState().
    
    Specified by:
    
    getInitialState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    Returns:
    the initial state enum object
  - setNextState
```
protected void setNextState(org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState state)
```
    Description copied from class: StateMachineProcedure
    
    Set the next state for the procedure.
    
    Overrides:
    
    setNextState in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    Parameters:
    state - the state enum object
  - abort
```
public boolean abort(MasterProcedureEnv env)
```
    Description copied from class: Procedure
    
    The abort() call is asynchronous and each procedure must decide how to deal with that, if they want to be abortable. The simplest implementation is to have an AtomicBoolean set in the abort() method and then the execute() will check if the abort flag is set or not. abort() may be called multiple times from the client, so the implementation must be idempotent. NOTE: abort() is not like Thread.interrupt() it is just a notification that allows the procedure implementor where to abort to avoid leak and have a better control on what was executed and what not.
    
    Specified by:
    
    abort in class Procedure<MasterProcedureEnv>
  - serializeStateData
```
public void serializeStateData(OutputStream stream)
                        throws IOException
```
    Description copied from class: Procedure
    
    The user-level code of the procedure may have some state to persist (e.g. input arguments) to be able to resume on failure.
    
    Overrides:
    
    serializeStateData in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    Parameters:
    stream - the stream that will contain the user serialized data
    
    Throws:
    
    IOException
  - deserializeStateData
```
public void deserializeStateData(InputStream stream)
                          throws IOException
```
    Description copied from class: Procedure
    
    Called on store load to allow the user to decode the previously serialized state.
    
    Overrides:
    
    deserializeStateData in class StateMachineProcedure<MasterProcedureEnv,org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.DeleteNamespaceState>
    
    Parameters:
    stream - the stream that contains the user serialized data
    
    Throws:
    
    IOException
  - toStringClassDetails
```
public void toStringClassDetails(StringBuilder sb)
```
    Description copied from class: Procedure
    
    Extend the toString() information with the procedure details e.g. className and parameters
    
    Overrides:
    
    toStringClassDetails in class Procedure<MasterProcedureEnv>
    
    Parameters:
    sb - the string builder to use to append the proc specific information
  - acquireLock
```
protected boolean acquireLock(MasterProcedureEnv env)
```
    Description copied from class: Procedure
    
    The user should override this method, and try to take a lock if necessary. A lock can be anything, and it is up to the implementor. Example: in our Master we can execute request in parallel for different tables create t1 and create t2 can be executed at the same time. anything else on t1/t2 is queued waiting that specific table create to happen.
    
    Overrides:
    
    acquireLock in class Procedure<MasterProcedureEnv>
    
    Returns:
    true if the lock was acquired and false otherwise
  - releaseLock
```
protected void releaseLock(MasterProcedureEnv env)
```
    Description copied from class: Procedure
    
    The user should override this method, and release lock if necessary.
    
    Overrides:
    
    releaseLock in class Procedure<MasterProcedureEnv>
  - getTableName
```
public TableName getTableName()
```
    Specified by:
    
    getTableName in interface TableProcedureInterface
    
    Returns:
    the name of the table the procedure is operating on
  - getTableOperationType
```
public TableProcedureInterface.TableOperationType getTableOperationType()
```
    Description copied from interface: TableProcedureInterface
    
    Given an operation type we can take decisions about what to do with pending operations. e.g. if we get a delete and we have some table operation pending (e.g. add column) we can abort those operations.
    
    Specified by:
    
    getTableOperationType in interface TableProcedureInterface
    
    Returns:
    the operation type that the procedure is executing.
  - deleteFromNSTable
```
protected static void deleteFromNSTable(MasterProcedureEnv env,
                     String namespaceName)
                                 throws IOException
```
    delete the row from namespace table
    
    Parameters:
    env - MasterProcedureEnv
    namespaceName - name of the namespace in string format
    
    Throws:
    
    IOException
  - removeFromZKNamespaceManager
```
protected static void removeFromZKNamespaceManager(MasterProcedureEnv env,
                                String namespaceName)
                                            throws IOException
```
    remove from Zookeeper.
    
    Parameters:
    env - MasterProcedureEnv
    namespaceName - name of the namespace in string format
    
    Throws:
    
    IOException
  - deleteDirectory
```
protected static void deleteDirectory(MasterProcedureEnv env,
                   String namespaceName)
                               throws IOException
```
    Delete the namespace directories from the file system
    
    Parameters:
    env - MasterProcedureEnv
    namespaceName - name of the namespace in string format
    
    Throws:
    
    IOException
  - removeNamespaceQuota
```
protected static void removeNamespaceQuota(MasterProcedureEnv env,
                        String namespaceName)
                                    throws IOException
```
    remove quota for the namespace
    
    Parameters:
    env - MasterProcedureEnv
    namespaceName - name of the namespace in string format
    
    Throws:
    
    IOException

Class DeleteNamespaceProcedure

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.master.procedure.TableProcedureInterface

Constructor Summary

Method Summary

Methods inherited from class org.apache.hadoop.hbase.procedure2.StateMachineProcedure

Methods inherited from class org.apache.hadoop.hbase.procedure2.Procedure

Methods inherited from class java.lang.Object

Constructor Detail

DeleteNamespaceProcedure

DeleteNamespaceProcedure

Method Detail

executeFromState

rollbackState

getState

getStateId

getInitialState

setNextState

abort

serializeStateData

deserializeStateData

toStringClassDetails

acquireLock

releaseLock

getTableName

getTableOperationType

deleteFromNSTable

removeFromZKNamespaceManager

deleteDirectory

removeNamespaceQuota