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package com.sun.jts.CosTransactions;
import java.util.Map;
import java.util.HashMap;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
import java.lang.reflect.Method;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.jts.utils.LogFormatter;
/** The LogDBHelper class takes care of writing the transaction logs
* into database.
* @author Sun Micro Systems, Inc
*/
class LogDBHelper {
String resName = "jdbc/TxnDS";
// serverName cannot be final - the instance is first requested
// during auto-recovery when the server name is not yet final
private String serverName;
final private String instanceName;
private DataSource ds = null;
private Method getNonTxConnectionMethod = null;
private static final String insertStatement =
System.getProperty("com.sun.jts.dblogging.insertquery",
"insert into txn_log_table values ( ? , ? , ? , ? )");
private static final String deleteStatement =
System.getProperty("com.sun.jts.dblogging.deletequery",
"delete from txn_log_table where localtid = ? and servername = ? ");
private static final String selectStatement =
System.getProperty("com.sun.jts.dblogging.selectquery",
"select * from txn_log_table where servername = ? ");
private static final String selectServerNameStatement =
System.getProperty("com.sun.jts.dblogging.selectservernamequery",
"select distinct servername from txn_log_table where instancename = ? ");
private static final String createTableStatement =
"create table txn_log_table (localtid varchar(20), servername varchar(150), instancename varchar(150), gtrid blob)";
private static final boolean useNonTxConnectionForAddRecord = Boolean.getBoolean("com.sun.jts.dblogging.use.nontx.connection.for.add");
private static Logger _logger = LogDomains.getLogger(LogDBHelper.class, LogDomains.TRANSACTION_LOGGER);
private static LogDBHelper _instance = new LogDBHelper();
static LogDBHelper getInstance() {
return _instance;
}
LogDBHelper() {
instanceName = Configuration.getPropertyValue(Configuration.INSTANCE_NAME);
if (Configuration.getPropertyValue(Configuration.DB_LOG_RESOURCE) != null) {
resName = Configuration.getPropertyValue(Configuration.DB_LOG_RESOURCE);
}
try {
InitialContext ctx = new InitialContext();
ds = (DataSource)ctx.lookup(resName);
Class cls = ds.getClass();
getNonTxConnectionMethod = cls.getMethod("getNonTxConnection", null);
createTable();
} catch (Throwable t) {
_logger.log(Level.SEVERE,"jts.unconfigured_db_log_resource",resName);
_logger.log(Level.SEVERE,"",t);
}
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper.resName: " + resName);
_logger.fine("LogDBHelper.ds: " + ds);
_logger.fine("LogDBHelper.getNonTxConnectionMethod: " + getNonTxConnectionMethod);
}
}
void setServerName() {
// Add a mapping between the serverName and the instanceName
String serverName0 = Configuration.getServerName();
if (serverName != null && serverName.equals(serverName0)) {
//Nothing changed
return;
} else {
serverName = serverName0;
}
if (_logger.isLoggable(Level.INFO)) {
_logger.info("LogDBHelper.setServerName for serverName: " + serverName);
_logger.info("LogDBHelper.setServerName for instanceName: " + instanceName);
}
String s = getServerNameForInstanceName(instanceName);
if (s == null) {
// Set the mapping
if (_logger.isLoggable(Level.INFO)) {
_logger.info("LogDBHelper.initTable adding marker record...");
}
addRecord(0, null);
} else if (!s.equals(serverName)) {
// Override the mapping
_logger.log(Level.WARNING, "jts.exception_in_db_log_server_to_instance_mapping",
new Object[] {instanceName, s, serverName});
deleteRecord(0, s);
addRecord(0, null);
}
}
boolean addRecord(long localTID, byte[] data) {
if (ds != null) {
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper.addRecord for localTID: " + localTID);
_logger.fine("LogDBHelper.addRecord for serverName: " + serverName);
_logger.fine("LogDBHelper.addRecord for instanceName: " + instanceName);
}
Connection conn = null;
PreparedStatement prepStmt1 = null;
try {
if (useNonTxConnectionForAddRecord)
conn = (Connection)(getNonTxConnectionMethod.invoke(ds, null));
else
conn = ds.getConnection();
prepStmt1 = conn.prepareStatement(insertStatement);
prepStmt1.setString(1,Long.toString(localTID));
prepStmt1.setString(2,serverName);
prepStmt1.setString(3,instanceName);
prepStmt1.setBytes(4,data);
prepStmt1 .executeUpdate();
return true;
} catch (Throwable ex) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex);
return false;
} finally {
try {
if (prepStmt1 != null)
prepStmt1.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
try {
if (conn != null)
conn.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
}
}
return false;
}
boolean deleteRecord(long localTID) {
return deleteRecord(localTID, serverName);
}
boolean deleteRecord(long localTID, String serverName0) {
if (ds != null) {
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper.deleteRecord for localTID: " + localTID + " and serverName: " + serverName0);
}
Connection conn = null;
PreparedStatement prepStmt1 = null;
try {
// To avoid compile time dependency to get NonTxConnection
conn = (Connection)(getNonTxConnectionMethod.invoke(ds, null));
prepStmt1 = conn.prepareStatement(deleteStatement);
prepStmt1.setString(1,Long.toString(localTID));
prepStmt1.setString(2,serverName0); //Configuration.getServerName());
prepStmt1 .executeUpdate();
return true;
} catch (Exception ex) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex);
return false;
} finally {
try {
if (prepStmt1 != null)
prepStmt1.close();
if (conn != null)
conn.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
}
}
return false;
}
Map getGlobalTIDMap() {
return getGlobalTIDMap(serverName);
}
Map getGlobalTIDMap(String serverName0) {
Map gtidMap = new HashMap();
if (ds != null) {
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper get records for serverName: " + serverName0);
}
Connection conn = null;
PreparedStatement prepStmt1 = null;
ResultSet rs = null;
try {
//conn = ds.getConnection();
conn = (Connection)(getNonTxConnectionMethod.invoke(ds, null));
prepStmt1 = conn.prepareStatement(selectStatement);
prepStmt1.setString(1,serverName0); //Configuration.getServerName());
rs = prepStmt1.executeQuery();
while (rs.next()) {
Long localTID = Long.valueOf(rs.getString(1));
byte[] gtridbytes = rs.getBytes(4);
if (gtridbytes != null) {
// Skip mapping record
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper found record for localTID: " + localTID + " and serverName: " + serverName0);
_logger.fine("LogDBHelper GlobalTID for localTID: " + localTID + " : " + GlobalTID.fromTIDBytes(gtridbytes));
}
gtidMap.put(GlobalTID.fromTIDBytes(gtridbytes), localTID);
}
}
} catch (Exception ex) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex);
} finally {
try {
if (rs != null)
rs.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
try {
if (prepStmt1 != null)
prepStmt1.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
try {
if (conn != null)
conn.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
}
}
return gtidMap;
}
String getServerNameForInstanceName(String instanceName0) {
String serverName0 = null;
if (ds != null) {
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper get serverName for instanceName: " + instanceName0);
}
Connection conn = null;
PreparedStatement prepStmt1 = null;
ResultSet rs = null;
try {
//conn = ds.getConnection();
conn = (Connection)(getNonTxConnectionMethod.invoke(ds, null));
prepStmt1 = conn.prepareStatement(selectServerNameStatement);
prepStmt1.setString(1,instanceName0);
rs = prepStmt1.executeQuery();
if (rs.next()) {
serverName0 = rs.getString(1);
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper found serverName: " + serverName0 + " for instanceName: " + instanceName0);
}
}
} catch (Exception ex) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex);
} finally {
try {
if (rs != null)
rs.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
try {
if (prepStmt1 != null)
prepStmt1.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
try {
if (conn != null)
conn.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
}
}
return serverName0;
}
private void createTable() {
if (ds != null) {
if (_logger.isLoggable(Level.FINE)) {
_logger.fine("LogDBHelper.createTable for instanceName: " + instanceName);
}
Connection conn = null;
Statement stmt1 = null;
try {
conn = (Connection)(getNonTxConnectionMethod.invoke(ds, null));
stmt1 = conn.createStatement();
stmt1.execute(createTableStatement);
_logger.fine("=== table created ===");
} catch (Exception ex) {
_logger.log(Level.INFO,"jts.exception_in_db_log_resource_create");
_logger.log(Level.FINE,"jts.exception_in_db_log_table_create_error", ex);
} finally {
try {
if (stmt1 != null)
stmt1.close();
if (conn != null)
conn.close();
} catch (Exception ex1) {
_logger.log(Level.SEVERE,"jts.exception_in_db_log_resource",ex1);
}
}
}
}
}
