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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.skynet.core.utility;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.jdk.core.type.Pair;
import org.eclipse.osee.jdbc.JdbcClient;
/**
* @author Donald G. Dunne
*/
public class OseeInfo {
private static final String GET_VALUE_SQL = "Select OSEE_VALUE FROM osee_info where OSEE_KEY = ?";
private static final String INSERT_KEY_VALUE_SQL = "INSERT INTO osee_info (OSEE_KEY, OSEE_VALUE) VALUES (?, ?)";
private static final String DELETE_KEY_SQL = "DELETE FROM osee_info WHERE OSEE_KEY = ?";
public static final String SAVE_OUTFILE_IN_DB = "SAVE_OUTFILE_IN_DB";
public static final String USE_GUID_STORAGE = "osee.framework.skynet.core.guid.storage";
// This is a unique identifier generated upon database initialization and should never be changed once it has been created.
public static final String DB_ID_KEY = "osee.db.guid";
public static final String DB_TYPE_KEY = "osee.db.type";
private static Map<String, Pair<Long, String>> cache = new ConcurrentHashMap<String, Pair<Long, String>>();
public static String getValue(String key) throws OseeCoreException {
return getValue(key, (long) Integer.MAX_VALUE);
}
public static String getValue(String key, Long maxStaleness) throws OseeCoreException {
return getValue(ConnectionHandler.getJdbcClient(), key, maxStaleness);
}
public static String getValue(JdbcClient jdbcClient, String key) {
return getValue(jdbcClient, key, (long) Integer.MAX_VALUE);
}
public static String getValue(JdbcClient jdbcClient, String key, Long maxStaleness) {
Pair<Long, String> pair = cache.get(key);
String value;
if (pair == null || pair.getFirst() + maxStaleness < System.currentTimeMillis()) {
value = jdbcClient.runPreparedQueryFetchObject("", GET_VALUE_SQL, key);
cacheValue(key, value);
} else {
value = pair.getSecond();
}
return value;
}
public static void setValue(String key, String value) throws OseeCoreException {
ConnectionHandler.runPreparedUpdate(DELETE_KEY_SQL, key);
ConnectionHandler.runPreparedUpdate(INSERT_KEY_VALUE_SQL, key, value);
cacheValue(key, value);
}
public static String getDatabaseGuid() throws OseeCoreException {
return getValue(DB_ID_KEY);
}
private static void cacheValue(String key, String value) {
Long time = System.currentTimeMillis();
cache.put(key, new Pair<Long, String>(time, value));
}
}
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