| Methods Summary |
|---|
| public static synchronized void | deregisterDriver(java.sql.Driver driver)Drops a driver from the DriverManager's list.
Applets can only deregister drivers from their own classloaders.
// Gets the classloader of the code that called this method,
// may be null.
ClassLoader callerCL = DriverManager.getCallerClassLoader();
println("DriverManager.deregisterDriver: " + driver);
// Walk through the loaded drivers.
int i;
DriverInfo di = null;
for (i = 0; i < writeDrivers.size(); i++) {
di = (DriverInfo)writeDrivers.elementAt(i);
if (di.driver == driver) {
break;
}
}
// If we can't find the driver just return.
if (i >= writeDrivers.size()) {
println(" couldn't find driver to unload");
return;
}
// If the caller does not have permission to load the driver then
// throw a security exception.
if (getCallerClass(callerCL, di.driverClassName ) != di.driverClass ) {
throw new SecurityException();
}
// Remove the driver. Other entries in drivers get shuffled down.
writeDrivers.removeElementAt(i);
/* update the read copy of drivers vector */
readDrivers = (java.util.Vector) writeDrivers.clone();
|
| private static java.lang.Class | getCallerClass(java.lang.ClassLoader callerClassLoader, java.lang.String driverClassName)
Class callerC = null;
try {
callerC = Class.forName(driverClassName, true, callerClassLoader);
}
catch (Exception ex) {
callerC = null; // being very careful
}
return callerC;
|
| private static native java.lang.ClassLoader | getCallerClassLoader()
|
| private static java.sql.Connection | getConnection(java.lang.String url, java.util.Properties info, java.lang.ClassLoader callerCL)
java.util.Vector drivers = null;
/*
* When callerCl is null, we should check the application's
* (which is invoking this class indirectly)
* classloader, so that the JDBC driver class outside rt.jar
* can be loaded from here.
*/
synchronized(DriverManager.class) {
// synchronize loading of the correct classloader.
if(callerCL == null) {
callerCL = Thread.currentThread().getContextClassLoader();
}
}
if(url == null) {
throw new SQLException("The url cannot be null", "08001");
}
println("DriverManager.getConnection(\"" + url + "\")");
if (!initialized) {
initialize();
}
synchronized (DriverManager.class){
// use the readcopy of drivers
drivers = readDrivers;
}
// Walk through the loaded drivers attempting to make a connection.
// Remember the first exception that gets raised so we can reraise it.
SQLException reason = null;
for (int i = 0; i < drivers.size(); i++) {
DriverInfo di = (DriverInfo)drivers.elementAt(i);
// If the caller does not have permission to load the driver then
// skip it.
if ( getCallerClass(callerCL, di.driverClassName ) != di.driverClass ) {
println(" skipping: " + di);
continue;
}
try {
println(" trying " + di);
Connection result = di.driver.connect(url, info);
if (result != null) {
// Success!
println("getConnection returning " + di);
return (result);
}
} catch (SQLException ex) {
if (reason == null) {
reason = ex;
}
}
}
// if we got here nobody could connect.
if (reason != null) {
println("getConnection failed: " + reason);
throw reason;
}
println("getConnection: no suitable driver found for "+ url);
throw new SQLException("No suitable driver found for "+ url, "08001");
|
| public static java.sql.Connection | getConnection(java.lang.String url, java.util.Properties info)Attempts to establish a connection to the given database URL.
The DriverManager attempts to select an appropriate driver from
the set of registered JDBC drivers.
// Gets the classloader of the code that called this method, may
// be null.
ClassLoader callerCL = DriverManager.getCallerClassLoader();
return (getConnection(url, info, callerCL));
|
| public static java.sql.Connection | getConnection(java.lang.String url, java.lang.String user, java.lang.String password)Attempts to establish a connection to the given database URL.
The DriverManager attempts to select an appropriate driver from
the set of registered JDBC drivers.
java.util.Properties info = new java.util.Properties();
// Gets the classloader of the code that called this method, may
// be null.
ClassLoader callerCL = DriverManager.getCallerClassLoader();
if (user != null) {
info.put("user", user);
}
if (password != null) {
info.put("password", password);
}
return (getConnection(url, info, callerCL));
|
| public static java.sql.Connection | getConnection(java.lang.String url)Attempts to establish a connection to the given database URL.
The DriverManager attempts to select an appropriate driver from
the set of registered JDBC drivers.
java.util.Properties info = new java.util.Properties();
// Gets the classloader of the code that called this method, may
// be null.
ClassLoader callerCL = DriverManager.getCallerClassLoader();
return (getConnection(url, info, callerCL));
|
| public static java.sql.Driver | getDriver(java.lang.String url)Attempts to locate a driver that understands the given URL.
The DriverManager attempts to select an appropriate driver from
the set of registered JDBC drivers.
java.util.Vector drivers = null;
println("DriverManager.getDriver(\"" + url + "\")");
if (!initialized) {
initialize();
}
synchronized (DriverManager.class){
// use the read copy of the drivers vector
drivers = readDrivers;
}
// Gets the classloader of the code that called this method, may
// be null.
ClassLoader callerCL = DriverManager.getCallerClassLoader();
// Walk through the loaded drivers attempting to locate someone
// who understands the given URL.
for (int i = 0; i < drivers.size(); i++) {
DriverInfo di = (DriverInfo)drivers.elementAt(i);
// If the caller does not have permission to load the driver then
// skip it.
if ( getCallerClass(callerCL, di.driverClassName ) !=
di.driverClass ) {
println(" skipping: " + di);
continue;
}
try {
println(" trying " + di);
if (di.driver.acceptsURL(url)) {
// Success!
println("getDriver returning " + di);
return (di.driver);
}
} catch (SQLException ex) {
// Drop through and try the next driver.
}
}
println("getDriver: no suitable driver");
throw new SQLException("No suitable driver", "08001");
|
| public static java.util.Enumeration | getDrivers()Retrieves an Enumeration with all of the currently loaded JDBC drivers
to which the current caller has access.
Note: The classname of a driver can be found using
d.getClass().getName()
java.util.Vector<Driver> result = new java.util.Vector<Driver>();
java.util.Vector drivers = null;
if (!initialized) {
initialize();
}
synchronized (DriverManager.class){
// use the readcopy of drivers
drivers = readDrivers;
}
// Gets the classloader of the code that called this method, may
// be null.
ClassLoader callerCL = DriverManager.getCallerClassLoader();
// Walk through the loaded drivers.
for (int i = 0; i < drivers.size(); i++) {
DriverInfo di = (DriverInfo)drivers.elementAt(i);
// If the caller does not have permission to load the driver then
// skip it.
if ( getCallerClass(callerCL, di.driverClassName ) != di.driverClass ) {
println(" skipping: " + di);
continue;
}
result.addElement(di.driver);
}
return (result.elements());
|
| public static java.io.PrintStream | getLogStream()Retrieves the logging/tracing PrintStream that is used by the DriverManager
and all drivers.
return logStream;
|
| public static java.io.PrintWriter | getLogWriter()Retrieves the log writer.
The getLogWriter and setLogWriter
methods should be used instead
of the get/setlogStream methods, which are deprecated.
//--------------------------JDBC 2.0-----------------------------
return logWriter;
|
| public static int | getLoginTimeout()Gets the maximum time in seconds that a driver can wait
when attempting to log in to a database.
return (loginTimeout);
|
| static void | initialize()
if (initialized) {
return;
}
initialized = true;
loadInitialDrivers();
println("JDBC DriverManager initialized");
|
| private static void | loadInitialDrivers()
String drivers;
try {
drivers = (String) java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("jdbc.drivers"));
} catch (Exception ex) {
drivers = null;
}
// If the driver is packaged as a Service Provider,
// load it.
// Get all the drivers through the classloader
// exposed as a java.sql.Driver.class service.
DriverService ds = new DriverService();
// Have all the privileges to get all the
// implementation of java.sql.Driver
java.security.AccessController.doPrivileged(ds);
println("DriverManager.initialize: jdbc.drivers = " + drivers);
if (drivers == null) {
return;
}
while (drivers.length() != 0) {
int x = drivers.indexOf(':");
String driver;
if (x < 0) {
driver = drivers;
drivers = "";
} else {
driver = drivers.substring(0, x);
drivers = drivers.substring(x+1);
}
if (driver.length() == 0) {
continue;
}
try {
println("DriverManager.Initialize: loading " + driver);
Class.forName(driver, true,
ClassLoader.getSystemClassLoader());
} catch (Exception ex) {
println("DriverManager.Initialize: load failed: " + ex);
}
}
|
| public static void | println(java.lang.String message)Prints a message to the current JDBC log stream.
synchronized (logSync) {
if (logWriter != null) {
logWriter.println(message);
// automatic flushing is never enabled, so we must do it ourselves
logWriter.flush();
}
}
|
| public static synchronized void | registerDriver(java.sql.Driver driver)Registers the given driver with the DriverManager.
A newly-loaded driver class should call
the method registerDriver to make itself
known to the DriverManager.
if (!initialized) {
initialize();
}
DriverInfo di = new DriverInfo();
di.driver = driver;
di.driverClass = driver.getClass();
di.driverClassName = di.driverClass.getName();
// Not Required -- drivers.addElement(di);
writeDrivers.addElement(di);
println("registerDriver: " + di);
/* update the read copy of drivers vector */
readDrivers = (java.util.Vector) writeDrivers.clone();
|
| public static void | setLogStream(java.io.PrintStream out)Sets the logging/tracing PrintStream that is used
by the DriverManager
and all drivers.
In the Java 2 SDK, Standard Edition, version 1.3 release, this method checks
to see that there is an SQLPermission object before setting
the logging stream. If a SecurityManager exists and its
checkPermission method denies setting the log writer, this
method throws a java.lang.SecurityException.
SecurityManager sec = System.getSecurityManager();
if (sec != null) {
sec.checkPermission(SET_LOG_PERMISSION);
}
logStream = out;
if ( out != null )
logWriter = new java.io.PrintWriter(out);
else
logWriter = null;
|
| public static void | setLogWriter(java.io.PrintWriter out)Sets the logging/tracing PrintWriter object
that is used by the DriverManager and all drivers.
There is a minor versioning problem created by the introduction
of the method setLogWriter. The
method setLogWriter cannot create a PrintStream object
that will be returned by getLogStream---the Java platform does
not provide a backward conversion. As a result, a new application
that uses setLogWriter and also uses a JDBC 1.0 driver that uses
getLogStream will likely not see debugging information written
by that driver.
Starting with the Java 2 SDK, Standard Edition, version 1.3 release, this method checks
to see that there is an SQLPermission object before setting
the logging stream. If a SecurityManager exists and its
checkPermission method denies setting the log writer, this
method throws a java.lang.SecurityException.
SecurityManager sec = System.getSecurityManager();
if (sec != null) {
sec.checkPermission(SET_LOG_PERMISSION);
}
logStream = null;
logWriter = out;
|
| public static void | setLoginTimeout(int seconds)Sets the maximum time in seconds that a driver will wait
while attempting to connect to a database.
loginTimeout = seconds;
|
