HConnectionManager.HConnectionImplementation (HBase

java.lang.Object
- org.apache.hadoop.hbase.client.HConnectionManager.HConnectionImplementation

All Implemented Interfaces:

Closeable, AutoCloseable, Abortable, HConnection

Enclosing class:

HConnectionManager
```
public static class HConnectionManager.HConnectionImplementation
extends Object
implements HConnection, Closeable
```
Encapsulates connection to zookeeper and regionservers.

Field Summary

Fields
Modifier and Type Field and Description

protected String clusterId
- Fields inherited from interface org.apache.hadoop.hbase.client.HConnection
  HBASE_CLIENT_CONNECTION_IMPL

Fields
Modifier and Type	Field and Description
`protected String`	`clusterId`

Constructor Summary

Constructors
Modifier Constructor and Description

protected HConnectionManager.HConnectionImplementation(org.apache.hadoop.conf.Configuration conf)
For tests.

Constructors
Modifier	Constructor and Description
`protected`	`HConnectionManager.HConnectionImplementation(org.apache.hadoop.conf.Configuration conf)` For tests.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`abort(String msg, Throwable t)` Abort the server or client.
`void`	`clearCaches(ServerName serverName)` Clear any caches that pertain to server name `sn`.
`void`	`clearRegionCache()` Allows flushing the region cache.
`void`	`clearRegionCache(byte[] tableName)`
`void`	`clearRegionCache(TableName tableName)` Allows flushing the region cache of all locations that pertain to `tableName`
`void`	`close()`
`protected <R> org.apache.hadoop.hbase.client.AsyncProcess`	`createAsyncProcess(TableName tableName, ExecutorService pool, org.apache.hadoop.hbase.client.AsyncProcess.AsyncProcessCallback<R> callback, org.apache.hadoop.conf.Configuration conf)`
`void`	`deleteCachedRegionLocation(HRegionLocation location)` Deletes cached locations for the specific region.
`protected void`	`finalize()` Close the connection for good, regardless of what the current value of `refCount` is.
`AdminProtos.AdminService.BlockingInterface`	`getAdmin(ServerName serverName)` Establishes a connection to the region server at the specified address.
`AdminProtos.AdminService.BlockingInterface`	`getAdmin(ServerName serverName, boolean master)` Establishes a connection to the region server at the specified address.
`ClientBackoffPolicy`	`getBackoffPolicy()`
`ClientProtos.ClientService.BlockingInterface`	`getClient(ServerName sn)` Establishes a connection to the region server at the specified address, and returns a region client protocol.
`org.apache.hadoop.conf.Configuration`	`getConfiguration()`
`protected ExecutorService`	`getCurrentBatchPool()`
`int`	`getCurrentNrHRS()`
`HTableDescriptor`	`getHTableDescriptor(byte[] tableName)`
`HTableDescriptor`	`getHTableDescriptor(TableName tableName)` Connects to the master to get the table descriptor.
`HTableDescriptor[]`	`getHTableDescriptors(List<String> names)`
`HTableDescriptor[]`	`getHTableDescriptorsByTableName(List<TableName> tableNames)`
`org.apache.hadoop.hbase.client.MasterKeepAliveConnection`	`getKeepAliveMasterService()` This function allows HBaseAdmin and potentially others to get a shared MasterService connection.
`MasterProtos.MasterService.BlockingInterface`	`getMaster()` Returns a `MasterKeepAliveConnection` to the active master
`NonceGenerator`	`getNonceGenerator()`
`boolean`	`getRegionCachePrefetch(byte[] tableName)`
`boolean`	`getRegionCachePrefetch(TableName tableName)` Check whether region cache prefetch is enabled or not.
`HRegionLocation`	`getRegionLocation(byte[] tableName, byte[] row, boolean reload)`
`HRegionLocation`	`getRegionLocation(TableName tableName, byte[] row, boolean reload)` Find region location hosting passed row
`ServerStatisticTracker`	`getStatisticsTracker()`
`HTableInterface`	`getTable(byte[] tableName)` Retrieve an HTableInterface implementation for access to a table.
`HTableInterface`	`getTable(byte[] tableName, ExecutorService pool)` Retrieve an HTableInterface implementation for access to a table.
`HTableInterface`	`getTable(String tableName)` Retrieve an HTableInterface implementation for access to a table.
`HTableInterface`	`getTable(String tableName, ExecutorService pool)` Retrieve an HTableInterface implementation for access to a table.
`HTableInterface`	`getTable(TableName tableName)` Retrieve an HTableInterface implementation for access to a table.
`HTableInterface`	`getTable(TableName tableName, ExecutorService pool)` Retrieve an HTableInterface implementation for access to a table.
`String[]`	`getTableNames()`
`boolean`	`isAborted()` Check if the server or client was aborted.
`boolean`	`isClosed()`
`boolean`	`isDeadServer(ServerName sn)`
`boolean`	`isMasterRunning()`
`boolean`	`isTableAvailable(byte[] tableName)`
`boolean`	`isTableAvailable(byte[] tableName, byte[][] splitKeys)`
`boolean`	`isTableAvailable(TableName tableName)`
`boolean`	`isTableAvailable(TableName tableName, byte[][] splitKeys)` Use this api to check if the table has been created with the specified number of splitkeys which was used while creating the given table.
`boolean`	`isTableDisabled(byte[] tableName)`
`boolean`	`isTableDisabled(TableName tableName)`
`boolean`	`isTableEnabled(byte[] tableName)`
`boolean`	`isTableEnabled(TableName tableName)` A table that isTableEnabled == false and isTableDisabled == false is possible.
`TableName[]`	`listTableNames()`
`HTableDescriptor[]`	`listTables()` List all the userspace tables.
`HRegionLocation`	`locateRegion(byte[] regionName)` Gets the location of the region of regionName.
`HRegionLocation`	`locateRegion(byte[] tableName, byte[] row)`
`HRegionLocation`	`locateRegion(TableName tableName, byte[] row)` Find the location of the region of tableName that row lives in.
`List<HRegionLocation>`	`locateRegions(byte[] tableName)`
`List<HRegionLocation>`	`locateRegions(byte[] tableName, boolean useCache, boolean offlined)`
`List<HRegionLocation>`	`locateRegions(TableName tableName)` Gets the locations of all regions in the specified table, tableName.
`List<HRegionLocation>`	`locateRegions(TableName tableName, boolean useCache, boolean offlined)` Gets the locations of all regions in the specified table, tableName.
`void`	`processBatch(List<? extends Row> list, byte[] tableName, ExecutorService pool, Object[] results)` Deprecated.
`void`	`processBatch(List<? extends Row> list, TableName tableName, ExecutorService pool, Object[] results)` Deprecated.
`<R> void`	`processBatchCallback(List<? extends Row> list, byte[] tableName, ExecutorService pool, Object[] results, Batch.Callback<R> callback)` Deprecated.
`<R> void`	`processBatchCallback(List<? extends Row> list, TableName tableName, ExecutorService pool, Object[] results, Batch.Callback<R> callback)` Deprecated. since 0.96 - Use `HTable.processBatchCallback(java.util.List<? extends org.apache.hadoop.hbase.client.Row>, java.lang.Object[], org.apache.hadoop.hbase.client.coprocessor.Batch.Callback<R>)` instead
`HRegionLocation`	`relocateRegion(byte[] tableName, byte[] row)`
`HRegionLocation`	`relocateRegion(TableName tableName, byte[] row)` Find the location of the region of tableName that row lives in, ignoring any value that might be in the cache.
`void`	`setRegionCachePrefetch(byte[] tableName, boolean enable)`
`void`	`setRegionCachePrefetch(TableName tableName, boolean enable)` Enable or disable region cache prefetch for the table.
`String`	`toString()` An identifier that will remain the same for a given connection.
`void`	`updateCachedLocations(byte[] tableName, byte[] rowkey, Object exception, HRegionLocation source)`
`void`	`updateCachedLocations(TableName tableName, byte[] rowkey, Object exception, HRegionLocation source)` Update the location with the new value (if the exception is a RegionMovedException) or delete it from the cache.

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

- Field Detail
  - clusterId
```
protected String clusterId
```
- Constructor Detail
  - HConnectionManager.HConnectionImplementation
```
protected HConnectionManager.HConnectionImplementation(org.apache.hadoop.conf.Configuration conf)
```
    For tests.
- Method Detail
  - getTable
```
public HTableInterface getTable(String tableName)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Retrieve an HTableInterface implementation for access to a table. The returned HTableInterface is not thread safe, a new instance should be created for each using thread. This is a lightweight operation, pooling or caching of the returned HTableInterface is neither required nor desired. Note that the HConnection needs to be unmanaged (created with HConnectionManager.createConnection(Configuration)).
    
    Specified by:
    
    getTable in interface HConnection
    
    Returns:
    an HTable to use for interactions with this table
    
    Throws:
    
    IOException
  - getTable
```
public HTableInterface getTable(byte[] tableName)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Retrieve an HTableInterface implementation for access to a table. The returned HTableInterface is not thread safe, a new instance should be created for each using thread. This is a lightweight operation, pooling or caching of the returned HTableInterface is neither required nor desired. Note that the HConnection needs to be unmanaged (created with HConnectionManager.createConnection(Configuration)).
    
    Specified by:
    
    getTable in interface HConnection
    
    Returns:
    an HTable to use for interactions with this table
    
    Throws:
    
    IOException
  - getTable
```
public HTableInterface getTable(TableName tableName)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Retrieve an HTableInterface implementation for access to a table. The returned HTableInterface is not thread safe, a new instance should be created for each using thread. This is a lightweight operation, pooling or caching of the returned HTableInterface is neither required nor desired. Note that the HConnection needs to be unmanaged (created with HConnectionManager.createConnection(Configuration)).
    
    Specified by:
    
    getTable in interface HConnection
    
    Returns:
    an HTable to use for interactions with this table
    
    Throws:
    
    IOException
  - getTable
```
public HTableInterface getTable(String tableName,
                       ExecutorService pool)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Retrieve an HTableInterface implementation for access to a table. The returned HTableInterface is not thread safe, a new instance should be created for each using thread. This is a lightweight operation, pooling or caching of the returned HTableInterface is neither required nor desired. Note that the HConnection needs to be unmanaged (created with HConnectionManager.createConnection(Configuration)).
    
    Specified by:
    
    getTable in interface HConnection
    
    pool - The thread pool to use for batch operations, null to use a default pool.
    
    Returns:
    an HTable to use for interactions with this table
    
    Throws:
    
    IOException
  - getTable
```
public HTableInterface getTable(byte[] tableName,
                       ExecutorService pool)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Retrieve an HTableInterface implementation for access to a table. The returned HTableInterface is not thread safe, a new instance should be created for each using thread. This is a lightweight operation, pooling or caching of the returned HTableInterface is neither required nor desired. Note that the HConnection needs to be unmanaged (created with HConnectionManager.createConnection(Configuration)).
    
    Specified by:
    
    getTable in interface HConnection
    
    pool - The thread pool to use for batch operations, null to use a default pool.
    
    Returns:
    an HTable to use for interactions with this table
    
    Throws:
    
    IOException
  - getTable
```
public HTableInterface getTable(TableName tableName,
                       ExecutorService pool)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Retrieve an HTableInterface implementation for access to a table. The returned HTableInterface is not thread safe, a new instance should be created for each using thread. This is a lightweight operation, pooling or caching of the returned HTableInterface is neither required nor desired. Note that the HConnection needs to be unmanaged (created with HConnectionManager.createConnection(Configuration)).
    
    Specified by:
    
    getTable in interface HConnection
    
    pool - The thread pool to use for batch operations, null to use a default pool.
    
    Returns:
    an HTable to use for interactions with this table
    
    Throws:
    
    IOException
  - getCurrentBatchPool
```
protected ExecutorService getCurrentBatchPool()
```
  - toString
```
public String toString()
```
    An identifier that will remain the same for a given connection.
    
    Overrides:
    
    toString in class Object
    
    Returns:
  - getConfiguration
```
public org.apache.hadoop.conf.Configuration getConfiguration()
```
    Specified by:
    
    getConfiguration in interface HConnection
    
    Returns:
    Configuration instance being used by this HConnection instance.
  - isMasterRunning
```
public boolean isMasterRunning()
                        throws MasterNotRunningException,
                               ZooKeeperConnectionException
```
    Specified by:
    
    isMasterRunning in interface HConnection
    
    Returns:
    true if the master is running, throws an exception otherwise
    
    Throws:
    
    MasterNotRunningException - - if the master is not running
    
    ZooKeeperConnectionException
  - getRegionLocation
```
public HRegionLocation getRegionLocation(TableName tableName,
                                byte[] row,
                                boolean reload)
                                  throws IOException
```
    Description copied from interface: HConnection
    
    Find region location hosting passed row
    
    Specified by:
    
    getRegionLocation in interface HConnection
    
    Parameters:
    tableName - table name
    row - Row to find.
    reload - If true do not use cache, otherwise bypass.
    
    Returns:
    Location of row.
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getRegionLocation
```
public HRegionLocation getRegionLocation(byte[] tableName,
                                byte[] row,
                                boolean reload)
                                  throws IOException
```
    Specified by:
    
    getRegionLocation in interface HConnection
    
    Throws:
    
    IOException
  - isTableEnabled
```
public boolean isTableEnabled(TableName tableName)
                       throws IOException
```
    Description copied from interface: HConnection
    
    A table that isTableEnabled == false and isTableDisabled == false is possible. This happens when a table has a lot of regions that must be processed.
    
    Specified by:
    
    isTableEnabled in interface HConnection
    
    Parameters:
    tableName - table name
    
    Returns:
    true if the table is enabled, false otherwise
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableEnabled
```
public boolean isTableEnabled(byte[] tableName)
                       throws IOException
```
    Specified by:
    
    isTableEnabled in interface HConnection
    
    Throws:
    
    IOException
  - isTableDisabled
```
public boolean isTableDisabled(TableName tableName)
                        throws IOException
```
    Specified by:
    
    isTableDisabled in interface HConnection
    
    Parameters:
    tableName - table name
    
    Returns:
    true if the table is disabled, false otherwise
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableDisabled
```
public boolean isTableDisabled(byte[] tableName)
                        throws IOException
```
    Specified by:
    
    isTableDisabled in interface HConnection
    
    Throws:
    
    IOException
  - isTableAvailable
```
public boolean isTableAvailable(TableName tableName)
                         throws IOException
```
    Specified by:
    
    isTableAvailable in interface HConnection
    
    Parameters:
    tableName - table name
    
    Returns:
    true if all regions of the table are available, false otherwise
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableAvailable
```
public boolean isTableAvailable(byte[] tableName)
                         throws IOException
```
    Specified by:
    
    isTableAvailable in interface HConnection
    
    Throws:
    
    IOException
  - isTableAvailable
```
public boolean isTableAvailable(TableName tableName,
                       byte[][] splitKeys)
                         throws IOException
```
    Description copied from interface: HConnection
    
    Use this api to check if the table has been created with the specified number of splitkeys which was used while creating the given table. Note : If this api is used after a table's region gets splitted, the api may return false.
    
    Specified by:
    
    isTableAvailable in interface HConnection
    
    Parameters:
    tableName - tableName
    splitKeys - splitKeys used while creating table
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isTableAvailable
```
public boolean isTableAvailable(byte[] tableName,
                       byte[][] splitKeys)
                         throws IOException
```
    Specified by:
    
    isTableAvailable in interface HConnection
    
    Throws:
    
    IOException
  - locateRegion
```
public HRegionLocation locateRegion(byte[] regionName)
                             throws IOException
```
    Description copied from interface: HConnection
    
    Gets the location of the region of regionName.
    
    Specified by:
    
    locateRegion in interface HConnection
    
    Parameters:
    regionName - name of the region to locate
    
    Returns:
    HRegionLocation that describes where to find the region in question
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - isDeadServer
```
public boolean isDeadServer(ServerName sn)
```
    Specified by:
    
    isDeadServer in interface HConnection
    
    Returns:
    true if the server is known as dead, false otherwise.
  - locateRegions
```
public List<HRegionLocation> locateRegions(TableName tableName)
                                    throws IOException
```
    Description copied from interface: HConnection
    
    Gets the locations of all regions in the specified table, tableName.
    
    Specified by:
    
    locateRegions in interface HConnection
    
    Parameters:
    tableName - table to get regions of
    
    Returns:
    list of region locations for all regions of table
    
    Throws:
    
    IOException
  - locateRegions
```
public List<HRegionLocation> locateRegions(byte[] tableName)
                                    throws IOException
```
    Specified by:
    
    locateRegions in interface HConnection
    
    Throws:
    
    IOException
  - locateRegions
```
public List<HRegionLocation> locateRegions(TableName tableName,
                                  boolean useCache,
                                  boolean offlined)
                                    throws IOException
```
    Description copied from interface: HConnection
    
    Gets the locations of all regions in the specified table, tableName.
    
    Specified by:
    
    locateRegions in interface HConnection
    
    Parameters:
    tableName - table to get regions of
    useCache - Should we use the cache to retrieve the region information.
    offlined - True if we are to include offlined regions, false and we'll leave out offlined regions from returned list.
    
    Returns:
    list of region locations for all regions of table
    
    Throws:
    
    IOException
  - locateRegions
```
public List<HRegionLocation> locateRegions(byte[] tableName,
                                  boolean useCache,
                                  boolean offlined)
                                    throws IOException
```
    Specified by:
    
    locateRegions in interface HConnection
    
    Throws:
    
    IOException
  - locateRegion
```
public HRegionLocation locateRegion(TableName tableName,
                           byte[] row)
                             throws IOException
```
    Description copied from interface: HConnection
    
    Find the location of the region of tableName that row lives in.
    
    Specified by:
    
    locateRegion in interface HConnection
    
    Parameters:
    tableName - name of the table row is in
    row - row key you're trying to find the region of
    
    Returns:
    HRegionLocation that describes where to find the region in question
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - locateRegion
```
public HRegionLocation locateRegion(byte[] tableName,
                           byte[] row)
                             throws IOException
```
    Specified by:
    
    locateRegion in interface HConnection
    
    Throws:
    
    IOException
  - relocateRegion
```
public HRegionLocation relocateRegion(TableName tableName,
                             byte[] row)
                               throws IOException
```
    Description copied from interface: HConnection
    
    Find the location of the region of tableName that row lives in, ignoring any value that might be in the cache.
    
    Specified by:
    
    relocateRegion in interface HConnection
    
    Parameters:
    tableName - name of the table row is in
    row - row key you're trying to find the region of
    
    Returns:
    HRegionLocation that describes where to find the region in question
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - relocateRegion
```
public HRegionLocation relocateRegion(byte[] tableName,
                             byte[] row)
                               throws IOException
```
    Specified by:
    
    relocateRegion in interface HConnection
    
    Throws:
    
    IOException
  - clearCaches
```
public void clearCaches(ServerName serverName)
```
    Description copied from interface: HConnection
    
    Clear any caches that pertain to server name sn.
    
    Specified by:
    
    clearCaches in interface HConnection
    
    Parameters:
    serverName - A server name
  - clearRegionCache
```
public void clearRegionCache()
```
    Description copied from interface: HConnection
    
    Allows flushing the region cache.
    
    Specified by:
    
    clearRegionCache in interface HConnection
  - clearRegionCache
```
public void clearRegionCache(TableName tableName)
```
    Description copied from interface: HConnection
    
    Allows flushing the region cache of all locations that pertain to tableName
    
    Specified by:
    
    clearRegionCache in interface HConnection
    
    Parameters:
    tableName - Name of the table whose regions we are to remove from cache.
  - clearRegionCache
```
public void clearRegionCache(byte[] tableName)
```
    Specified by:
    
    clearRegionCache in interface HConnection
  - getAdmin
```
public AdminProtos.AdminService.BlockingInterface getAdmin(ServerName serverName)
                                                    throws IOException
```
    Description copied from interface: HConnection
    
    Establishes a connection to the region server at the specified address.
    
    Specified by:
    
    getAdmin in interface HConnection
    
    Returns:
    proxy for HRegionServer
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getAdmin
```
public AdminProtos.AdminService.BlockingInterface getAdmin(ServerName serverName,
                                                  boolean master)
                                                    throws IOException
```
    Description copied from interface: HConnection
    
    Establishes a connection to the region server at the specified address.
    
    Specified by:
    
    getAdmin in interface HConnection
    
    master - do we check if master is alive
    
    Returns:
    proxy for HRegionServer
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getClient
```
public ClientProtos.ClientService.BlockingInterface getClient(ServerName sn)
                                                       throws IOException
```
    Description copied from interface: HConnection
    
    Establishes a connection to the region server at the specified address, and returns a region client protocol.
    
    Specified by:
    
    getClient in interface HConnection
    
    Returns:
    ClientProtocol proxy for RegionServer
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getMaster
```
public MasterProtos.MasterService.BlockingInterface getMaster()
                                                       throws MasterNotRunningException
```
    Description copied from interface: HConnection
    
    Returns a MasterKeepAliveConnection to the active master
    
    Specified by:
    
    getMaster in interface HConnection
    
    Throws:
    
    MasterNotRunningException
  - getKeepAliveMasterService
```
public org.apache.hadoop.hbase.client.MasterKeepAliveConnection getKeepAliveMasterService()
                                                                                   throws MasterNotRunningException
```
    Description copied from interface: HConnection
    
    This function allows HBaseAdmin and potentially others to get a shared MasterService connection.
    
    Specified by:
    
    getKeepAliveMasterService in interface HConnection
    
    Returns:
    The shared instance. Never returns null.
    
    Throws:
    
    MasterNotRunningException
  - deleteCachedRegionLocation
```
public void deleteCachedRegionLocation(HRegionLocation location)
```
    Description copied from interface: HConnection
    
    Deletes cached locations for the specific region.
    
    Specified by:
    
    deleteCachedRegionLocation in interface HConnection
    
    Parameters:
    location - The location object for the region, to be purged from cache.
  - updateCachedLocations
```
public void updateCachedLocations(TableName tableName,
                         byte[] rowkey,
                         Object exception,
                         HRegionLocation source)
```
    Update the location with the new value (if the exception is a RegionMovedException) or delete it from the cache. Does nothing if we can be sure from the exception that the location is still accurate, or if the cache has already been updated.
    
    Specified by:
    
    updateCachedLocations in interface HConnection
    
    Parameters:
    exception - an object (to simplify user code) on which we will try to find a nested or wrapped or both RegionMovedException
    source - server that is the source of the location update.
    tableName - the table name
    rowkey - the row
  - updateCachedLocations
```
public void updateCachedLocations(byte[] tableName,
                         byte[] rowkey,
                         Object exception,
                         HRegionLocation source)
```
    Specified by:
    
    updateCachedLocations in interface HConnection
  - processBatch
```
@Deprecated
public void processBatch(List<? extends Row> list,
                           TableName tableName,
                           ExecutorService pool,
                           Object[] results)
                  throws IOException,
                         InterruptedException
```
    Deprecated.
    
    Description copied from interface: HConnection
    
    Process a mixed batch of Get, Put and Delete actions. All actions for a RegionServer are forwarded in one RPC call.
    
    Specified by:
    
    processBatch in interface HConnection
    
    Parameters:
    list - The collection of actions.
    tableName - Name of the hbase table
    pool - thread pool for parallel execution
    results - An empty array, same size as list. If an exception is thrown, you can test here for partial results, and to determine which actions processed successfully.
    
    Throws:
    
    IOException - if there are problems talking to META. Per-item exceptions are stored in the results array.
    
    InterruptedException
  - processBatch
```
@Deprecated
public void processBatch(List<? extends Row> list,
                           byte[] tableName,
                           ExecutorService pool,
                           Object[] results)
                  throws IOException,
                         InterruptedException
```
    Deprecated.
    
    Specified by:
    
    processBatch in interface HConnection
    
    Throws:
    
    IOException
    
    InterruptedException
  - processBatchCallback
```
@Deprecated
public <R> void processBatchCallback(List<? extends Row> list,
                                       TableName tableName,
                                       ExecutorService pool,
                                       Object[] results,
                                       Batch.Callback<R> callback)
                          throws IOException,
                                 InterruptedException
```
    Deprecated. since 0.96 - Use HTable.processBatchCallback(java.util.List<? extends org.apache.hadoop.hbase.client.Row>, java.lang.Object[], org.apache.hadoop.hbase.client.coprocessor.Batch.Callback<R>) instead
    
    Send the queries in parallel on the different region servers. Retries on failures. If the method returns it means that there is no error, and the 'results' array will contain no exception. On error, an exception is thrown, and the 'results' array will contain results and exceptions.
    
    Specified by:
    
    processBatchCallback in interface HConnection
    
    Throws:
    
    IOException
    
    InterruptedException
  - processBatchCallback
```
@Deprecated
public <R> void processBatchCallback(List<? extends Row> list,
                                       byte[] tableName,
                                       ExecutorService pool,
                                       Object[] results,
                                       Batch.Callback<R> callback)
                          throws IOException,
                                 InterruptedException
```
    Deprecated.
    
    Specified by:
    
    processBatchCallback in interface HConnection
    
    Throws:
    
    IOException
    
    InterruptedException
  - createAsyncProcess
```
protected <R> org.apache.hadoop.hbase.client.AsyncProcess createAsyncProcess(TableName tableName,
                                                                 ExecutorService pool,
                                                                 org.apache.hadoop.hbase.client.AsyncProcess.AsyncProcessCallback<R> callback,
                                                                 org.apache.hadoop.conf.Configuration conf)
```
  - getStatisticsTracker
```
public ServerStatisticTracker getStatisticsTracker()
```
    Specified by:
    
    getStatisticsTracker in interface HConnection
    
    Returns:
    the current statistics tracker associated with this connection
  - getBackoffPolicy
```
public ClientBackoffPolicy getBackoffPolicy()
```
    Specified by:
    
    getBackoffPolicy in interface HConnection
    
    Returns:
    the configured client backoff policy
  - setRegionCachePrefetch
```
public void setRegionCachePrefetch(TableName tableName,
                          boolean enable)
```
    Description copied from interface: HConnection
    
    Enable or disable region cache prefetch for the table. It will be applied for the given table's all HTable instances within this connection. By default, the cache prefetch is enabled.
    
    Specified by:
    
    setRegionCachePrefetch in interface HConnection
    
    Parameters:
    tableName - name of table to configure.
    enable - Set to true to enable region cache prefetch.
  - setRegionCachePrefetch
```
public void setRegionCachePrefetch(byte[] tableName,
                          boolean enable)
```
    Specified by:
    
    setRegionCachePrefetch in interface HConnection
  - getRegionCachePrefetch
```
public boolean getRegionCachePrefetch(TableName tableName)
```
    Description copied from interface: HConnection
    
    Check whether region cache prefetch is enabled or not.
    
    Specified by:
    
    getRegionCachePrefetch in interface HConnection
    
    Parameters:
    tableName - name of table to check
    
    Returns:
    true if table's region cache prefetch is enabled. Otherwise it is disabled.
  - getRegionCachePrefetch
```
public boolean getRegionCachePrefetch(byte[] tableName)
```
    Specified by:
    
    getRegionCachePrefetch in interface HConnection
  - abort
```
public void abort(String msg,
         Throwable t)
```
    Description copied from interface: Abortable
    
    Abort the server or client.
    
    Specified by:
    
    abort in interface Abortable
    
    Parameters:
    msg - Why we're aborting.
    t - Throwable that caused abort. Can be null.
  - isClosed
```
public boolean isClosed()
```
    Specified by:
    
    isClosed in interface HConnection
    
    Returns:
    true if this connection is closed
  - isAborted
```
public boolean isAborted()
```
    Description copied from interface: Abortable
    
    Check if the server or client was aborted.
    
    Specified by:
    
    isAborted in interface Abortable
    
    Returns:
    true if the server or client was aborted, false otherwise
  - getCurrentNrHRS
```
public int getCurrentNrHRS()
                    throws IOException
```
    Specified by:
    
    getCurrentNrHRS in interface HConnection
    
    Returns:
    the number of region servers that are currently running
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - close
```
public void close()
```
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
  - finalize
```
protected void finalize()
                 throws Throwable
```
    Close the connection for good, regardless of what the current value of refCount is. Ideally, refCount should be zero at this point, which would be the case if all of its consumers close the connection. However, on the off chance that someone is unable to close the connection, perhaps because it bailed out prematurely, the method below will ensure that this HConnection instance is cleaned up. Caveat: The JVM may take an unknown amount of time to call finalize on an unreachable object, so our hope is that every consumer cleans up after itself, like any good citizen.
    
    Overrides:
    
    finalize in class Object
    
    Throws:
    
    Throwable
  - listTables
```
public HTableDescriptor[] listTables()
                              throws IOException
```
    Description copied from interface: HConnection
    
    List all the userspace tables. In other words, scan the hbase:meta table. If we wanted this to be really fast, we could implement a special catalog table that just contains table names and their descriptors. Right now, it only exists as part of the hbase:meta table's region info.
    
    Specified by:
    
    listTables in interface HConnection
    
    Returns:
    - returns an array of HTableDescriptors
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getTableNames
```
public String[] getTableNames()
                       throws IOException
```
    Specified by:
    
    getTableNames in interface HConnection
    
    Throws:
    
    IOException
  - listTableNames
```
public TableName[] listTableNames()
                           throws IOException
```
    Specified by:
    
    listTableNames in interface HConnection
    
    Throws:
    
    IOException
  - getHTableDescriptorsByTableName
```
public HTableDescriptor[] getHTableDescriptorsByTableName(List<TableName> tableNames)
                                                   throws IOException
```
    Specified by:
    
    getHTableDescriptorsByTableName in interface HConnection
    
    Parameters:
    tableNames - List of table names
    
    Returns:
    HTD[] table metadata
    
    Throws:
    
    IOException - if a remote or network exception occurs
  - getHTableDescriptors
```
public HTableDescriptor[] getHTableDescriptors(List<String> names)
                                        throws IOException
```
    Specified by:
    
    getHTableDescriptors in interface HConnection
    
    Throws:
    
    IOException
  - getNonceGenerator
```
public NonceGenerator getNonceGenerator()
```
    Specified by:
    
    getNonceGenerator in interface HConnection
    
    Returns:
    Nonce generator for this HConnection; may be null if disabled in configuration.
  - getHTableDescriptor
```
public HTableDescriptor getHTableDescriptor(TableName tableName)
                                     throws IOException
```
    Connects to the master to get the table descriptor.
    
    Specified by:
    
    getHTableDescriptor in interface HConnection
    
    Parameters:
    tableName - table name
    
    Returns:
    
    Throws:
    
    IOException - if the connection to master fails or if the table is not found.
  - getHTableDescriptor
```
public HTableDescriptor getHTableDescriptor(byte[] tableName)
                                     throws IOException
```
    Specified by:
    
    getHTableDescriptor in interface HConnection
    
    Throws:
    
    IOException

Class HConnectionManager.HConnectionImplementation

Field Summary

Fields inherited from interface org.apache.hadoop.hbase.client.HConnection

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

clusterId

Constructor Detail

HConnectionManager.HConnectionImplementation

Method Detail

getTable

getTable

getTable

getTable

getTable

getTable

getCurrentBatchPool

toString

getConfiguration

isMasterRunning

getRegionLocation

getRegionLocation

isTableEnabled

isTableEnabled

isTableDisabled

isTableDisabled

isTableAvailable

isTableAvailable

isTableAvailable

isTableAvailable

locateRegion

isDeadServer

locateRegions

locateRegions

locateRegions

locateRegions

locateRegion

locateRegion

relocateRegion

relocateRegion

clearCaches

clearRegionCache

clearRegionCache

clearRegionCache

getAdmin

getAdmin

getClient

getMaster

getKeepAliveMasterService

deleteCachedRegionLocation

updateCachedLocations

updateCachedLocations

processBatch

processBatch

processBatchCallback

processBatchCallback

createAsyncProcess

getStatisticsTracker

getBackoffPolicy

setRegionCachePrefetch

setRegionCachePrefetch

getRegionCachePrefetch

getRegionCachePrefetch

abort

isClosed

isAborted

getCurrentNrHRS

close

finalize

listTables

getTableNames

listTableNames

getHTableDescriptorsByTableName

getHTableDescriptors

getNonceGenerator

getHTableDescriptor

getHTableDescriptor