Package com.tangosol.run.jca

Class CacheAdapter

java.lang.Object
com.tangosol.util.Base
com.tangosol.run.jca.CacheAdapter
public class CacheAdapter extends Base
CacheAdapter encapsulates the operations neccessary to communicate with Coherence™ resource adapter (coherence-tx.rar). The Coherence resource adapter, in turn, is a gateway into the Coherence clustered services, so some methods closely resemble methods at CacheFactory class.

In a simplest form a client code would look like: 


   Context ctx = new InitialContext();

   CacheAdapter adapter = new CacheAdapter(ctx, "tangosol.coherenceTx",
       CacheAdapter.CONCUR_OPTIMISTIC, CacheAdapter.TRANSACTION_REPEATABLE_GET, 0);
   try
       {
       NamedCache map = adapter.getNamedCache("MyCache", getClass().getClassLoader(),
           new SimpleValidator(), false);

       // perform operations on the map
       }
   finally
       {
       adapter.close();
       }
Note: the CacheAdapter is intended to be used by one and only one thread at the time and is not thread safe.

Since:
Coherence 1.2
Author:
gg 2002.04.14

  • Field Details

  • Constructor Details

    • CacheAdapter

      public CacheAdapter()
      Construct the adapter using a default InitialContext, standard JNDI name, "optimistic" concurrency, "committed" isolation level an no timeout.

    • CacheAdapter

      public CacheAdapter(Context ctx, String sJndiName, int nConcur, int nIsolation, int nTimeout)
      Construct the adapter using the specified Context and JNDI name
      Parameters:
      ctx - the Context object to use for lookup operation; if null, the default InitialiContext is used
      sJndiName - the JNDI name of the Coherence resource adapter; if null, the default name ("tangosol.coherenceTx") is used
      nConcur - the default concurrency value
      nIsolation - the default transaction isolation value
      nTimeout - the default transaction timeout value (in seconds)

  • Method Details

    • getReplicatedCache

      public NamedCache getReplicatedCache(String sName, ClassLoader loader)
      Deprecated.
      use getNamedCache(java.lang.String, java.lang.ClassLoader) instead.
      Obtain an instance of a ReplicatedCache.

      When called within a transaction, the returned cache will be transactional, controlled by the container's transaction coordinator. When called outside of a transaction, the returned cache will be non-transactional, which is equivalent to obtaining the instance directly from CacheFactory.

      Parameters:
      sName - cache name (unique across the cluster). If the NamedCache with the specified name already exists, a reference to the same object will be returned in the same transactional context
      loader - ClassLoader that should be used to deserialize objects inserted in the map by other members of the cluster
      Returns:
      NamedCache interface of the ReplicatedCache service
      Throws:
      IllegalStateException - if the adapter is already connected to a different service

    • getDistributedCache

      public NamedCache getDistributedCache(String sName, ClassLoader loader)
      Deprecated.
      use getNamedCache(java.lang.String, java.lang.ClassLoader) instead.
      Obtain an instance of a DistributedCache.

      When called within a transaction, the returned cache will be transactional, controlled by the container's transaction coordinator. When called outside of a transaction, the returned cache will be non-transactional, which is equivalent to obtaining the instance directly from CacheFactory.

      Parameters:
      sName - cache name (unique across the cluster). If the NamedCache with the specified name already exists, a reference to the same object will be returned in the same transactional context
      loader - ClassLoader that should be used to deserialize objects inserted in the map by other members of the cluster
      Returns:
      NamedCache interface of the DistributedCache service
      Throws:
      IllegalStateException - if the adapter is already connected to a different service

    • connect

      public void connect(String sServiceName, String sUserName, String sPassword)
      Connect the adapter to the specified clustered service. The service with the specified name must be running for this call to succeed.
      Parameters:
      sServiceName - service name (unique across the cluster)
      sUserName - name of the user establishing a connection (optional)
      sPassword - password for the user establishing a connection (optional)
      Throws:
      IllegalArgumentException - if the specified service is not running
      IllegalStateException - if the adapter is already connected or

    • connect

      public void connect(String sServiceName, String sServiceType, String sUserName, String sPassword)
      Connect the adapter to the specified clustered service. If the service with the specified name is not running an attempt will be made to start that service [default configuration]. If the name and type are not specified, a ConfigurableCacheFactory will be used to obtain the NamedCache instances.
      Parameters:
      sServiceName - service name (unique across the cluster)
      sServiceType - service type (i.e. CacheService.TYPE_REPLICATED or CacheService.TYPE_DISTRIBUTED)
      sUserName - name of the user establishing a connection (optional)
      sPassword - password for the user establishing a connection (optional)
      Throws:
      IllegalArgumentException - if the specified service cannot be found
      IllegalStateException - if the adapter is already connected

    • getNamedCache

      public NamedCache getNamedCache(String sName, ClassLoader loader)
      Obtain an instance of a NamedCache. The NamedCache will be retrieved from the current ConfigurableCacheFactory using CacheFactory.getCache(sName, loader) unless the adapter is already connected to a specific cache service, in which case the corresponding NamedCache will be retrieved using service.ensureCache(sName, loader).

      When called within a transaction, the returned cache will be transactional, controlled by the container's transaction coordinator. When called outside of a transaction, the returned cache will be non-transactional, which is equivalent to obtaining the instance directly from CacheFactory.

      Parameters:
      sName - cache name (unique across the cluster). If the NamedCache with the specified name already exists, a reference to the same object will be returned in the same transactional context
      loader - ClassLoader that should be used to deserialize objects inserted in the map by other members of the cluster
      Returns:
      NamedCache object

    • getNamedCache

      public NamedCache getNamedCache(String sName, ClassLoader loader, TransactionMap.Validator validator, boolean fImmutable)
      Obtain an instance of a NamedCache. The NamedCache will be retrieved from the current ConfigurableCacheFactory using CacheFactory.getCache(sName, loader) unless the adapter is already connected to a specific cache service, in which case the corresponding NamedCache will be retrieved using service.ensureCache(sName, loader).

      When called within a transaction, the returned cache will be transactional, controlled by the container's transaction coordinator. When called outside of a transaction, the returned cache will be non-transactional, which is equivalent to obtaining the instance directly from CacheFactory.

      Parameters:
      sName - cache name (unique across the cluster). If the NamedCache with the specified name already exists, a reference to the same object will be returned in the same transactional context
      loader - ClassLoader that should be used to deserialize objects inserted in the map by other members of the cluster
      validator - the Validator object to be used to enlist and validate transactional resources; this parameter is only used within transactional context and only for optimistic concurrency
      fImmutable - specifies whether or not the values kept in this cache are known to be immutable; this parameter is only used within transactional context
      Returns:
      NamedCache object
      Since:
      Coherence 2.3
      See Also:

    • close

      public void close()
      Close the connection associated with this adapter.

    • isConnected

      protected boolean isConnected()
      Return the connection status.
      Returns:
      true if the adapter is currently connected; false otherwise.

    • toString

      public String toString()
      Return a human readable description of the CacheAdapter.
      Overrides:
      toString in class Object
      Returns:
      a String representation of the CacheAdapter

    • finalize

      protected void finalize()
      Perform cleanup during garbage collection.
      Overrides:
      finalize in class Object