Java Doc for RAIDb1ec_RR.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » controller » loadbalancer » raidb1 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.controller.loadbalancer.raidb1 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1
   org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1ec
      org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1ec_RR

RAIDb1ec_RR
public class RAIDb1ec_RR extends RAIDb1ec (Code)
RAIDb-1 Round Robin load balancer with error checking.

This load balancer tolerates byzantine failures of databases. The read requests coming from the Request Manager are sent to multiple backend nodes and the results are compared. Write requests are broadcasted to all backends.
author:
   Emmanuel Cecchet
author:
   Julie Marguerite
version:
   1.0




Constructor Summary
public  RAIDb1ec_RR(VirtualDatabase vdb, WaitForCompletionPolicy waitForCompletionPolicy, ErrorCheckingPolicy errorCheckingPolicy, int nbOfConcurrentReads)
     Creates a new RAIDb-1 Round Robin with error checking request load balancer.

Method Summary
public  ControllerResultSetexecSingleBackendReadRequest(SelectRequest request, MetadataCache metadataCache)
     Not implemented.
public  StringgetInformation()
     Gets information about the request load balancer.
public  StringgetRaidb1Xml()
    
public  ExecuteResultreadOnlyCallableStatementExecute(StoredProcedure proc, MetadataCache metadataCache)
     Not implemented.
public  ControllerResultSetreadOnlyCallableStatementExecuteQuery(StoredProcedure proc, MetadataCache metadataCache)
     Not implemented.


Constructor Detail
RAIDb1ec_RR
public RAIDb1ec_RR(VirtualDatabase vdb, WaitForCompletionPolicy waitForCompletionPolicy, ErrorCheckingPolicy errorCheckingPolicy, int nbOfConcurrentReads) throws Exception(Code)
Creates a new RAIDb-1 Round Robin with error checking request load balancer.
Parameters:
  vdb - the virtual database this load balancer belongs to.
Parameters:
  waitForCompletionPolicy - how many backends must complete beforereturning the result?
Parameters:
  errorCheckingPolicy - policy to apply for error checking.
Parameters:
  nbOfConcurrentReads - Number of concurrent reads allowed
exception:
  Exception - if an error occurs




Method Detail
execSingleBackendReadRequest
public ControllerResultSet execSingleBackendReadRequest(SelectRequest request, MetadataCache metadataCache) throws SQLException(Code)
Not implemented.
See Also:   org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1.statementExecuteQuery(SelectRequestMetadataCache)



getInformation
public String getInformation()(Code)
Gets information about the request load balancer. String containing information



getRaidb1Xml
public String getRaidb1Xml()(Code)

See Also:   org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1.getRaidb1Xml



readOnlyCallableStatementExecute
public ExecuteResult readOnlyCallableStatementExecute(StoredProcedure proc, MetadataCache metadataCache) throws SQLException(Code)
Not implemented.
See Also:   org.continuent.sequoia.controller.loadbalancer.AbstractLoadBalancer.readOnlyCallableStatementExecute(org.continuent.sequoia.controller.requests.StoredProcedureorg.continuent.sequoia.controller.cache.metadata.MetadataCache)



readOnlyCallableStatementExecuteQuery
public ControllerResultSet readOnlyCallableStatementExecuteQuery(StoredProcedure proc, MetadataCache metadataCache) throws SQLException(Code)
Not implemented.
See Also:   org.continuent.sequoia.controller.loadbalancer.AbstractLoadBalancer.readOnlyCallableStatementExecuteQuery(StoredProcedureMetadataCache)



Fields inherited from org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1ec
protected ArrayList backendReadThreads(Code)(Java Doc)
protected ErrorCheckingPolicy errorCheckingPolicy(Code)(Java Doc)
protected static Trace logger(Code)(Java Doc)
protected int nbOfConcurrentReads(Code)(Java Doc)

Methods inherited from org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1ec
public String getXmlImpl()(Code)(Java Doc)

Fields inherited from org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1
final protected static int CALLABLE_STATEMENT_EXECUTE(Code)(Java Doc)
final protected static int CALLABLE_STATEMENT_EXECUTE_QUERY(Code)(Java Doc)
final protected static int STATEMENT_EXECUTE_QUERY(Code)(Java Doc)
protected static Trace endUserLogger(Code)(Java Doc)
protected static Trace logger(Code)(Java Doc)

Methods inherited from org.continuent.sequoia.controller.loadbalancer.raidb1.RAIDb1
public void abort(TransactionMetaData tm) throws SQLException(Code)(Java Doc)
final public void begin(TransactionMetaData tm) throws SQLException(Code)(Java Doc)
public ExecuteResult callableStatementExecute(StoredProcedure proc, MetadataCache metadataCache) throws SQLException, AllBackendsFailedException(Code)(Java Doc)
public ControllerResultSet callableStatementExecuteQuery(StoredProcedure proc, MetadataCache metadataCache) throws SQLException, AllBackendsFailedException(Code)(Java Doc)
public ExecuteUpdateResult callableStatementExecuteUpdate(StoredProcedure proc) throws SQLException, AllBackendsFailedException(Code)(Java Doc)
public void closePersistentConnection(String login, long persistentConnectionId) throws SQLException(Code)(Java Doc)
public void commit(TransactionMetaData tm) throws SQLException(Code)(Java Doc)
public void disableBackend(DatabaseBackend db, boolean forceDisable) throws SQLException(Code)(Java Doc)
public synchronized void enableBackend(DatabaseBackend db, boolean writeEnabled) throws SQLException(Code)(Java Doc)
abstract public ControllerResultSet execSingleBackendReadRequest(SelectRequest request, MetadataCache metadataCache) throws SQLException(Code)(Java Doc)
protected ControllerResultSet executeRequestOnBackend(SelectRequest request, DatabaseBackend backend, MetadataCache metadataCache) throws SQLException, UnreachableBackendException(Code)(Java Doc)
protected Object executeStoredProcedureOnBackend(StoredProcedure proc, boolean isExecuteQuery, DatabaseBackend backend, MetadataCache metadataCache) throws SQLException, UnreachableBackendException(Code)(Java Doc)
public ControllerResultSet getPreparedStatementGetMetaData(AbstractRequest request) throws SQLException(Code)(Java Doc)
abstract public String getRaidb1Xml()(Code)(Java Doc)
public String getXmlImpl()(Code)(Java Doc)
public void openPersistentConnection(String login, long persistentConnectionId) throws SQLException(Code)(Java Doc)
public void releaseSavepoint(TransactionMetaData tm, String savepointName) throws SQLException(Code)(Java Doc)
public void rollback(TransactionMetaData tm) throws SQLException(Code)(Java Doc)
public void rollbackToSavepoint(TransactionMetaData tm, String savepointName) throws SQLException(Code)(Java Doc)
public void setSavepoint(TransactionMetaData tm, String savepointName) throws SQLException(Code)(Java Doc)
public ExecuteResult statementExecute(AbstractRequest request, MetadataCache metadataCache) throws SQLException, AllBackendsFailedException(Code)(Java Doc)
public ControllerResultSet statementExecuteQuery(SelectRequest request, MetadataCache metadataCache) throws SQLException, AllBackendsFailedException(Code)(Java Doc)
public ExecuteUpdateResult statementExecuteUpdate(AbstractWriteRequest request) throws AllBackendsFailedException, NoMoreBackendException, SQLException(Code)(Java Doc)
public GeneratedKeysResult statementExecuteUpdateWithKeys(AbstractWriteRequest request, MetadataCache metadataCache) throws AllBackendsFailedException, NoMoreBackendException, SQLException(Code)(Java Doc)

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