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Core services for Usergrid system.
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/*******************************************************************************
 * Copyright 2012 Apigee Corporation
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package org.usergrid.persistence.cassandra;

import static me.prettyprint.hector.api.factory.HFactory.createColumnFamilyDefinition;
import static org.usergrid.persistence.cassandra.CassandraPersistenceUtils.getCfDefs;
import static org.usergrid.persistence.cassandra.CassandraService.APPLICATIONS_CF;
import static org.usergrid.persistence.cassandra.CassandraService.DEFAULT_APPLICATION;
import static org.usergrid.persistence.cassandra.CassandraService.DEFAULT_APPLICATION_ID;
import static org.usergrid.persistence.cassandra.CassandraService.DEFAULT_ORGANIZATION;
import static org.usergrid.persistence.cassandra.CassandraService.MANAGEMENT_APPLICATION;
import static org.usergrid.persistence.cassandra.CassandraService.MANAGEMENT_APPLICATION_ID;
import static org.usergrid.persistence.cassandra.CassandraService.PROPERTIES_CF;
import static org.usergrid.persistence.cassandra.CassandraService.STATIC_APPLICATION_KEYSPACE;
import static org.usergrid.persistence.cassandra.CassandraService.SYSTEM_KEYSPACE;
import static org.usergrid.persistence.cassandra.CassandraService.*;
import static org.usergrid.persistence.cassandra.CassandraService.USE_VIRTUAL_KEYSPACES;
import static org.usergrid.persistence.cassandra.CassandraService.keyspaceForApplication;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import me.prettyprint.hector.api.ddl.ColumnFamilyDefinition;
import me.prettyprint.hector.api.ddl.ComparatorType;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.usergrid.mq.cassandra.QueuesCF;

// TODO: Auto-generated Javadoc
/**
 * Cassandra-specific setup utilities.
 * 
 * @author edanuff
 */
public class Setup {

	private static final Logger logger = LoggerFactory.getLogger(Setup.class);

	private final org.usergrid.persistence.EntityManagerFactory emf;
	private final CassandraService cass;

	/**
	 * Instantiates a new setup object.
	 * 
	 * @param emf
	 *            the emf
	 * @param cass
	 */
	Setup(EntityManagerFactoryImpl emf, CassandraService cass) {
		this.emf = emf;
		this.cass = cass;
	}

	/**
	 * Initialize.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	public synchronized void setup() throws Exception {
		cass.init();

		setupSystemKeyspace();

		setupStaticKeyspace();

		((EntityManagerFactoryImpl) emf).initializeApplication(
				DEFAULT_ORGANIZATION, DEFAULT_APPLICATION_ID,
				DEFAULT_APPLICATION, null);

		((EntityManagerFactoryImpl) emf).initializeApplication(
				DEFAULT_ORGANIZATION, MANAGEMENT_APPLICATION_ID,
				MANAGEMENT_APPLICATION, null);
	}

	/**
	 * Initialize system keyspace.
	 * 
	 * @throws Exception
	 *             the exception
	 */
	public void setupSystemKeyspace() throws Exception {

		logger.info("Initialize system keyspace");

		List cf_defs = new ArrayList();
		cf_defs.add(createColumnFamilyDefinition(SYSTEM_KEYSPACE,
				APPLICATIONS_CF, ComparatorType.BYTESTYPE));
		cf_defs.add(createColumnFamilyDefinition(SYSTEM_KEYSPACE,
				PROPERTIES_CF, ComparatorType.BYTESTYPE));
		cf_defs.add(createColumnFamilyDefinition(SYSTEM_KEYSPACE, TOKENS_CF,
				ComparatorType.BYTESTYPE));
		cf_defs.add(createColumnFamilyDefinition(SYSTEM_KEYSPACE, PRINCIPAL_TOKEN_CF,
                ComparatorType.UUIDTYPE));

		cass.createKeyspace(SYSTEM_KEYSPACE, cf_defs);

		logger.info("System keyspace initialized");
	}

	/**
	 * Initialize application keyspace.
	 * 
	 * @param applicationId
	 *            the application id
	 * @param applicationName
	 *            the application name
	 * @throws Exception
	 *             the exception
	 */
	public void setupApplicationKeyspace(final UUID applicationId,
			String applicationName) throws Exception {

		if (!USE_VIRTUAL_KEYSPACES) {
			String app_keyspace = keyspaceForApplication(applicationId);

			logger.info("Creating application keyspace " + app_keyspace
					+ " for " + applicationName + " application");

			cass.createKeyspace(
					app_keyspace,
					getCfDefs(ApplicationCF.class,
							getCfDefs(QueuesCF.class, app_keyspace),
							app_keyspace));

			/*
			 * String messages_keyspace = app_keyspace +
			 * APPLICATION_MESSAGES_KEYSPACE_SUFFIX;
			 * cass.createKeyspace(messages_keyspace, getCfDefs(QueuesCF.class,
			 * messages_keyspace));
			 */
		}
	}

	public void setupStaticKeyspace() throws Exception {

		if (USE_VIRTUAL_KEYSPACES) {

			logger.info("Creating static application keyspace "
					+ STATIC_APPLICATION_KEYSPACE);

			cass.createKeyspace(
					STATIC_APPLICATION_KEYSPACE,
					getCfDefs(
							ApplicationCF.class,
							getCfDefs(QueuesCF.class,
									STATIC_APPLICATION_KEYSPACE),
							STATIC_APPLICATION_KEYSPACE));

			/*
			 * cass.createKeyspace(STATIC_MESSAGES_KEYSPACE,
			 * getCfDefs(QueuesCF.class, STATIC_MESSAGES_KEYSPACE));
			 */
		}
	}

	public void checkKeyspaces() {
		cass.checkKeyspaces();
	}

	public static void logCFPermissions() {
		System.out.println(SYSTEM_KEYSPACE + "." + APPLICATIONS_CF
				+ ".=usergrid");
		System.out.println(SYSTEM_KEYSPACE + "." + PROPERTIES_CF
				+ ".=usergrid");
		for (CFEnum cf : ApplicationCF.values()) {
			System.out.println(STATIC_APPLICATION_KEYSPACE + "." + cf
					+ ".=usergrid");
		}
		for (CFEnum cf : QueuesCF.values()) {
			System.out.println(STATIC_APPLICATION_KEYSPACE + "." + cf
					+ ".=usergrid");
		}
	}

}