com.endeca.portal.mdex
Class TransactionUtil

java.lang.Object
  com.endeca.portal.mdex.TransactionUtil

public class TransactionUtil
extends java.lang.Object

This class calls outer transaction web services to provide transaction supports to EID Studio. With transaction services, the caller can start, commit or rollback a transaction, which may consist of multiple "write" operations. Using of transaction will help with keeping data consistency in certain circumstances. This class is called/wrapped by the DataSource class. The user should use DataSource class instead of TransactionUtil class for transaction management. A typical usage pattern is as follows (pseudo-codes): String outerTransactionId=null; try{ outerTransactionId=DataSource#startOuterTransaction(); //call write operations that supports transaction management, e.g. deleteAllFilterRules, putFilterRules. ... //commit the transaction DataSource#commitOuterTransaction(outerTransactionId); }catch(Exception e){ //in case that an exception occurs, rollback the transaction (if the transaction has been started). //Note: Do NOT rollback transaction that has not yet been started. if(outerTransactionId!=null) DataSource#rollBackOuterTransaction(outerTransactionId); Logger#error("... Error message: "+e.getMessage()); throw e; }

Author:

walterwu

Nested Class Summary

static class	TransactionUtil.CommitOuterTransactionOperation
static class	TransactionUtil.ListOuterTransactionOperation
static class	TransactionUtil.RollBackOuterTransactionOperation
static class	TransactionUtil.StartOuterTransactionOperation

Field Summary

static java.lang.String

TRANSACTION_SERVICE

Constructor Summary

TransactionUtil()

Method Summary

static <OperationType,ResponseType> ResponseType

executeTransactionOperation(MDEXState mdexState, RequestIds requestIds, com.endeca.portal.mdex.TransactionUtil.TransactionOperation<ResponseType> op, java.lang.String languageId)

Methods inherited from class java.lang.Object

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

Field Detail

TRANSACTION_SERVICE

public static final java.lang.String TRANSACTION_SERVICE

See Also:

Constant Field Values

Constructor Detail

TransactionUtil

public TransactionUtil()

Method Detail

executeTransactionOperation

public static <OperationType,ResponseType> ResponseType executeTransactionOperation(MDEXState mdexState,
                                                                                    RequestIds requestIds,
                                                                                    com.endeca.portal.mdex.TransactionUtil.TransactionOperation<ResponseType> op,
                                                                                    java.lang.String languageId)
                                                throws DataSourceException,
                                                       java.lang.UnsupportedOperationException

Throws:

DataSourceException

java.lang.UnsupportedOperationException