http://wiki.eclipse.org/EclipseLink/Examples/JPA/Employee
http://java-persistence-performance.blogspot.com/2013/06/cool-performance-features-of.html

pkill -9 crdb && rm -rf /tmp/far/* && (cd /tmp/far; crdb start --background --http-port=9090 --vmodule=executor=2; sleep 1) && echo "create database farsite;" | crdb sql && tail -f  /tmp/far/cockroach-data/logs/crdb.log


// jpa weaving
def entitiesBasePackage = 'com.example.farsite.model'

compileJava {
    destinationDir file("$buildDir/compiled-classes")
}

task copyNonPersistentClasses(type: Copy, dependsOn: compileJava) {
    from "$buildDir/compiled-classes"
    into sourceSets.main.output.classesDir
    exclude '**/' + entitiesBasePackage.replaceAll('\\.','/') + '/**'
    includeEmptyDirs = false
}
task copyPersistentClasses(type: Copy, dependsOn: compileJava) {
    from "$buildDir/compiled-classes"
    into "$buildDir/unwoven-persistent-classes"
    include '**/' + entitiesBasePackage.replaceAll('\\.','/') + '/**'
    includeEmptyDirs = false
}
task weaveJpaEntities(type: JavaExec, dependsOn: [copyPersistentClasses,processResources]) {
    main = 'org.eclipse.persistence.tools.weaving.jpa.StaticWeave'
    classpath configurations.weave.incoming.files
    args '-persistenceinfo'
    args processResources.destinationDir.absolutePath
    args '-classpath'
    args configurations.compile.incoming.files.asPath
    args '-loglevel'
    args 'INFO'
    args copyPersistentClasses.destinationDir.absolutePath
    args sourceSets.main.output.classesDir.absolutePath

    inputs.files fileTree(copyPersistentClasses.destinationDir),fileTree(processResources.destinationDir).matching({pattern -> pattern.include('**/META-INF/persistence.xml')})
    outputs.dir sourceSets.main.output.classesDir
}
//classes.dependsOn copyNonPersistentClasses,weaveJpaEntities

dependencies
    weave group: 'org.eclipse.persistence', name: 'javax.persistence', version: '2.+'
    weave group: 'org.eclipse.persistence', name: 'org.eclipse.persistence.jpa', version: '2.+'

configurations
    weave

mainClassName = "com.example.farsite.Main"