org.neo4j.kernel.impl.transaction.xaframework
Class TransactionInterceptorProvider

java.lang.Object
  org.neo4j.helpers.Service
      org.neo4j.kernel.impl.transaction.xaframework.TransactionInterceptorProvider

Direct Known Subclasses:

InconsistencyLoggingTransactionInterceptorProvider, VerifyingTransactionInterceptorProvider

public abstract class TransactionInterceptorProvider
extends Service

The basic service implementation for TransactionInterceptorProviders. Offers two ways to instantiate a TransactionInterceptor - one is standalone, the other is with an existing one as the next in the chain of responsibility.

Nested Class Summary

Nested classes/interfaces inherited from class org.neo4j.helpers.Service

Service.CaseInsensitiveService, Service.Implementation

Constructor Summary

TransactionInterceptorProvider(String name)

Method Summary

abstract TransactionInterceptor	create(TransactionInterceptor next, XaDataSource ds, Object options) Creates a TransactionInterceptor with the given datasource and options and the given TransactionInterceptor as the next in the chain.
abstract TransactionInterceptor	create(XaDataSource ds, Object options) Creates a TransactionInterceptor with the given datasource and options.
abstract String	name() Returns the name of this provider
static TransactionInterceptor	resolveChain(List<Pair<TransactionInterceptorProvider,Object>> providers, XaDataSource ds) A utility method that given some TransactionInterceptorProviders and their configuration objects returns a fully resolved chain of TransactionInterceptors - the return object is the first interceptor in the chain.

Methods inherited from class org.neo4j.helpers.Service

load, load, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TransactionInterceptorProvider

public TransactionInterceptorProvider(String name)

Method Detail

name

public abstract String name()

Returns the name of this provider

Returns:

The name of this provider

create

public abstract TransactionInterceptor create(XaDataSource ds,
                                              Object options)

Creates a TransactionInterceptor with the given datasource and options. It is possible for this method to return null, signifying that the options passed did not allow for instantiation.

Parameters:

ds - The datasource the TransactionInterceptor will communicate with

options - An object that can be the options to instantiate the interceptor with - e.g "false" to prevent instantiation

Returns:

An implementation of TransactionInterceptor or null if the options say so.

create

public abstract TransactionInterceptor create(TransactionInterceptor next,
                                              XaDataSource ds,
                                              Object options)

Creates a TransactionInterceptor with the given datasource and options and the given TransactionInterceptor as the next in the chain. It is possible for this method to return null, signifying that the options passed did not allow for instantiation.

Parameters:

ds - The datasource the TransactionInterceptor will communicate with

options - An object that can be the options to instantiate the interceptor with - e.g "false" to prevent instantiation

next - The next interceptor in the chain - can be null

Returns:

An implementation of TransactionInterceptor or null if the options say so.

resolveChain

public static TransactionInterceptor resolveChain(List<Pair<TransactionInterceptorProvider,Object>> providers,
                                                  XaDataSource ds)

A utility method that given some TransactionInterceptorProviders and their configuration objects returns a fully resolved chain of TransactionInterceptors - the return object is the first interceptor in the chain.

Parameters:

providers - A list of Pair of TransactionInterceptorProviders with the detected config objects

ds - The datasource to instantiate the TransactionInterceptors with

Returns:

The fist interceptor in the chain, possibly null