JavaPerformanceTuning/StockCreateJPA/README at master · tmjee/JavaPerformanceTuning · GitHub

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To build:

This is a standalone (Java SE) application for JPA.

In your environment, set

JAVAX_PERSISTENCE=path_to/javax.persistence.jar

The META-INF/persistence.xml file contains information that JPA will

use for the database connection. Edit it for the appropriate values for

your database. That file is based on the eclipselink JPA reference

implementation; it will need other changes for Hibernate or other

JPA implementations (chaging the provider class and eclipselink

property names).

Although the example doesn't use JDBC directly, you will need the

appropriate JDBC driver to compile the application (so that the

driver gets set into the classpath). In your environment, set

JDBC_JAR=/path_to/ojdbc6.jar

(or whichever driver you are using).

To run:

Use the schema file in StockCreateJDBC to create the necessary schema

in the database.

Running a Java SE program with JPA requires that the JPA classes be

"enhanced". Eclipselink does this at run time using the javaagent

argument. Other implementations may require that the jar file be

pre-processed; check your provider documentation to see if that is

required.

java <jvmargs> -javaagent:${ECLIPSELINK_JAR} -jar jars/StockCreateJPA.jar \

nThreads nStocks startDate endDate nTransactions reuseEM reuseTX

nThreads -- Number of threads to use for parallel insert

nStocks -- Number of stocks to insert

startDate -- Starting date of range

endDate -- Ending date of range

nTransactions -- Number of stocks per transaction

reuseEM -- If true, don't create a new EM for each transaction

reuseTX -- If true, don't create a new transaction

Notes on Examples:

Example 11-2:

java -javaagent:${ECLIPSELINK_JAR} -jar jars/StockCreateJPA.jar \

1 128 1/1/13 12/31/13 128 true true

To explore changes in statement caching and batch sizes, change the

values in persistence.xml

JavaPerformanceTuning/StockCreateJPA/README at master · tmjee/JavaPerformanceTuning · GitHub

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