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java.lang.Objectorg.apache.hadoop.hbase.client.AbstractClientScanner
org.apache.hadoop.hbase.client.ClientScanner
@InterfaceAudience.Public @InterfaceStability.Stable public class ClientScanner
Implements the scanner interface for the HBase client. If there are multiple regions in a table, this scanner will iterate through them all.
Field Summary | |
---|---|
protected LinkedList<Result> |
cache
|
protected int |
caching
|
protected org.apache.hadoop.hbase.client.ScannerCallable |
callable
|
protected org.apache.hadoop.hbase.client.RpcRetryingCaller<Result[]> |
caller
|
protected boolean |
closed
|
protected HRegionInfo |
currentRegion
|
protected long |
lastNext
|
protected Result |
lastResult
|
protected long |
maxScannerResultSize
|
protected org.apache.hadoop.hbase.ipc.RpcControllerFactory |
rpcControllerFactory
|
protected Scan |
scan
|
protected boolean |
scanMetricsPublished
|
protected int |
scannerTimeout
|
Fields inherited from class org.apache.hadoop.hbase.client.AbstractClientScanner |
---|
scanMetrics |
Constructor Summary | |
---|---|
ClientScanner(org.apache.hadoop.conf.Configuration conf,
Scan scan,
byte[] tableName)
Deprecated. Use ClientScanner(Configuration, Scan, TableName) |
|
ClientScanner(org.apache.hadoop.conf.Configuration conf,
Scan scan,
byte[] tableName,
HConnection connection)
Deprecated. Use ClientScanner(Configuration, Scan, TableName, HConnection) |
|
ClientScanner(org.apache.hadoop.conf.Configuration conf,
Scan scan,
TableName tableName)
Deprecated. |
|
ClientScanner(org.apache.hadoop.conf.Configuration conf,
Scan scan,
TableName tableName,
HConnection connection)
Create a new ClientScanner for the specified table Note that the passed Scan 's start row maybe changed changed. |
|
ClientScanner(org.apache.hadoop.conf.Configuration conf,
Scan scan,
TableName tableName,
HConnection connection,
org.apache.hadoop.hbase.client.RpcRetryingCallerFactory rpcFactory)
Deprecated. Use ClientScanner(Configuration, Scan, TableName, HConnection,
RpcRetryingCallerFactory, RpcControllerFactory)
instead |
|
ClientScanner(org.apache.hadoop.conf.Configuration conf,
Scan scan,
TableName tableName,
HConnection connection,
org.apache.hadoop.hbase.client.RpcRetryingCallerFactory rpcFactory,
org.apache.hadoop.hbase.ipc.RpcControllerFactory controllerFactory)
Create a new ClientScanner for the specified table Note that the passed Scan 's start
row maybe changed changed. |
Method Summary | |
---|---|
protected boolean |
checkScanStopRow(byte[] endKey)
|
void |
close()
Closes the scanner and releases any resources it has allocated |
int |
getCacheSize()
|
protected HConnection |
getConnection()
|
protected long |
getMaxResultSize()
|
protected Scan |
getScan()
|
protected TableName |
getTable()
|
protected byte[] |
getTableName()
Deprecated. Since 0.96.0; use getTable() |
protected long |
getTimestamp()
|
protected void |
initializeScannerInConstruction()
|
protected void |
loadCache()
Contact the servers to load more Result s in the cache. |
Result |
next()
Grab the next row's worth of values. |
protected boolean |
nextScanner(int nbRows,
boolean done)
|
boolean |
renewLease()
Allow the client to renew the scanner's lease on the server. |
protected void |
writeScanMetrics()
Publish the scan metrics. |
Methods inherited from class org.apache.hadoop.hbase.client.AbstractClientScanner |
---|
getScanMetrics, initScanMetrics, iterator, next |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected Scan scan
protected boolean closed
protected HRegionInfo currentRegion
protected org.apache.hadoop.hbase.client.ScannerCallable callable
protected final LinkedList<Result> cache
protected final int caching
protected long lastNext
protected Result lastResult
protected final long maxScannerResultSize
protected final int scannerTimeout
protected boolean scanMetricsPublished
protected org.apache.hadoop.hbase.client.RpcRetryingCaller<Result[]> caller
protected org.apache.hadoop.hbase.ipc.RpcControllerFactory rpcControllerFactory
Constructor Detail |
---|
@Deprecated public ClientScanner(org.apache.hadoop.conf.Configuration conf, Scan scan, TableName tableName) throws IOException
Scan
's start row maybe changed changed.
conf
- The Configuration
to use.scan
- Scan
to use in this scannertableName
- The table that we wish to scan
IOException
@Deprecated public ClientScanner(org.apache.hadoop.conf.Configuration conf, Scan scan, byte[] tableName) throws IOException
ClientScanner(Configuration, Scan, TableName)
IOException
public ClientScanner(org.apache.hadoop.conf.Configuration conf, Scan scan, TableName tableName, HConnection connection) throws IOException
Scan
's start row maybe changed changed.
conf
- The Configuration
to use.scan
- Scan
to use in this scannertableName
- The table that we wish to scanconnection
- Connection identifying the cluster
IOException
@Deprecated public ClientScanner(org.apache.hadoop.conf.Configuration conf, Scan scan, byte[] tableName, HConnection connection) throws IOException
ClientScanner(Configuration, Scan, TableName, HConnection)
IOException
@Deprecated public ClientScanner(org.apache.hadoop.conf.Configuration conf, Scan scan, TableName tableName, HConnection connection, org.apache.hadoop.hbase.client.RpcRetryingCallerFactory rpcFactory) throws IOException
ClientScanner(Configuration, Scan, TableName, HConnection,
RpcRetryingCallerFactory, RpcControllerFactory)
instead
IOException
public ClientScanner(org.apache.hadoop.conf.Configuration conf, Scan scan, TableName tableName, HConnection connection, org.apache.hadoop.hbase.client.RpcRetryingCallerFactory rpcFactory, org.apache.hadoop.hbase.ipc.RpcControllerFactory controllerFactory) throws IOException
Scan
's start
row maybe changed changed.
conf
- The Configuration
to use.scan
- Scan
to use in this scannertableName
- The table that we wish to scanconnection
- Connection identifying the cluster
IOException
Method Detail |
---|
protected void initializeScannerInConstruction() throws IOException
IOException
protected HConnection getConnection()
@Deprecated protected byte[] getTableName()
getTable()
protected TableName getTable()
protected Scan getScan()
protected long getTimestamp()
protected long getMaxResultSize()
protected boolean checkScanStopRow(byte[] endKey)
protected boolean nextScanner(int nbRows, boolean done) throws IOException
IOException
protected void writeScanMetrics()
public Result next() throws IOException
ResultScanner
IOException
- epublic int getCacheSize()
protected void loadCache() throws IOException
Result
s in the cache.
IOException
public void close()
ResultScanner
public boolean renewLease()
org.apache.hadoop.hbase.client.AbstractClientScanner
renewLease
in class org.apache.hadoop.hbase.client.AbstractClientScanner
|
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