Hibernate example source code file (DBAllocation.groovy)

This example Hibernate source code file (DBAllocation.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

antbuilder, db, db, db_allocator_url, db_allocator_url, dballocation, dballocation, de-allocating, file, properties, re-allocating, string, uuid, uuid

The Hibernate DBAllocation.groovy source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */

package hudson.util

/**
 *
 * @author mvecera
 */
class DBAllocation {
    private final static String DB_ALLOCATOR_URL = "http://dballocator.mw.lab.eng.bos.redhat.com:8080/Allocator/AllocatorServlet";
    private dbinstallPath = "dbinstall"
    private retries = 30
    private UUID = ""
    private ant
    private File dbConfigFile;
    private String requestee;

    def DBAllocation(dbinstallPath) {
        this(new AntBuilder(), dbinstallPath)
    }

    def DBAllocation(ant, dbinstallPath, outPropsFileName = "allocated.db.properties") {
        this.ant = ant;
        this.dbinstallPath = dbinstallPath;
        this.dbConfigFile = new File(dbinstallPath, outPropsFileName);
        if(System.properties.containsKey("hibernate-matrix-dballocation-requestee"))
        requestee = System.properties["hibernate-matrix-dballocation-requestee"]
        else
        requestee = "hibernate"
    }

    def getProperties() {
        def props = new Properties();
        props.load(new FileInputStream(dbConfigFile));
        return props;
    }

    def allocate(label, expiry) {
        if ( dbConfigFile.exists() ) {
            dbConfigFile.delete()
        }
        def i = 0
        while ( !(dbConfigFile.exists() && dbConfigFile.length() > 0) ) {
            if ( i >= retries ) {
                throw new Exception('Database unavailable')
            }
            if ( i > 0 ) {
                println "Waiting before trying to allocate DB again."
                Thread.sleep(60000)
            }
            println "Allocating DB..."
            def allocatorUrl = DB_ALLOCATOR_URL + "?operation=alloc&label=$label&requestee=${requestee}&expiry=$expiry"
            ant.get(src: allocatorUrl, dest: dbConfigFile.absolutePath, ignoreerrors: 'true')
            i++
        }
        def dbProps = getProperties();
        this.UUID = dbProps['uuid']
        return this.UUID
    }

    def release() {
        release(this.UUID)
    }

    def release(UUID) {
        println 'De-allocating DB...'
        def allocatorUrl = DB_ALLOCATOR_URL + "?operation=dealloc&uuid=$UUID"
        ant.get(src: allocatorUrl, dest: "/tmp/.tmpfile")
    }

    def clean() {
        clean(this.UUID);
    }

    def clean(UUID) {
        println 'Cleaning DB...'
        def allocatorUrl = DB_ALLOCATOR_URL + "?operation=erase&uuid=$UUID"
        ant.get(src: allocatorUrl, dest: "/tmp/.tmpfile")
    }

    def reallocate(newExpiry) {
        reallocate(this.UUID, newExpiry)
    }

    def reallocate(UUID, newExpiry) {
        println 'Re-allocating DB...'
        def allocatorUrl = DB_ALLOCATOR_URL + "?operation=realloc&uuid=$UUID&expiry=$newExpiry"
        ant.get(src: allocatorUrl, dest: "/tmp/.tmpfile")
    }
}