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package com.sun.xml.ws.policy.privateutil;
import java.lang.reflect.Field;
import java.util.logging.Level;
import static com.sun.xml.ws.policy.privateutil.PolicyUtils.Commons.getCallerMethodName;
/**
* This is a helper class that provides some conveniece methods wrapped around the
* standard {@link java.util.logging.Logger} interface.
*
* @author Marek Potociar
*/
public final class PolicyLogger {
/**
* If we run with JAX-WS, we are using its logging domain (appended with ".wspolicy").
* Otherwise we default to "wspolicy".
*/
private static final String LOGGING_SUBSYSTEM_NAME;
private static final Level METHOD_CALL_LEVEL_VALUE = Level.FINEST;
static {
String loggingSubsystemName = "wspolicy";
try {
// Looking up JAX-WS class at run-time, so that we don't need to depend
// on it at compile-time.
Class jaxwsConstants = Class.forName("com.sun.xml.ws.util.Constants");
Field loggingDomainField = jaxwsConstants.getField("LoggingDomain");
Object loggingDomain = loggingDomainField.get(null);
loggingSubsystemName = loggingDomain.toString().concat(".wspolicy");
} catch (Exception e) {
// if we catch an exception, we fall back to default name
loggingSubsystemName = "wspolicy";
} finally {
LOGGING_SUBSYSTEM_NAME = loggingSubsystemName;
}
}
private final String componentClassName;
private final java.util.logging.Logger logger;
/**
* Prevents creation of a new instance of this PolicyLogger
*/
private PolicyLogger(final String componentName) {
this.componentClassName = "[" + componentName + "] ";
this.logger = java.util.logging.Logger.getLogger(LOGGING_SUBSYSTEM_NAME);
}
/**
* The factory method returns preconfigured PolicyLogger wrapper for the class. Since there is no caching implemented,
* it is advised that the method is called only once per a class in order to initialize a final static logger variable,
* which is then used through the class to perform actual logging tasks.
*
* @param componentClass class of the component that will use the logger instance. Must not be {@code null}.
* @return logger instance preconfigured for use with the component
* @throws NullPointerException if the componentClass parameter is {@code null}.
*/
public static PolicyLogger getLogger(final Class componentClass) {
return new PolicyLogger(componentClass.getName());
}
public void log(final Level level, final String message) {
if (!this.logger.isLoggable(level)) {
return;
}
logger.logp(level, componentClassName, getCallerMethodName(), message);
}
public void log(final Level level, final String message, final Throwable thrown) {
if (!this.logger.isLoggable(level)) {
return;
}
logger.logp(level, componentClassName, getCallerMethodName(), message, thrown);
}
public void finest(final String message) {
if (!this.logger.isLoggable(Level.FINEST)) {
return;
}
logger.logp(Level.FINEST, componentClassName, getCallerMethodName(), message);
}
public void finest(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.FINEST)) {
return;
}
logger.logp(Level.FINEST, componentClassName, getCallerMethodName(), message, thrown);
}
public void finer(final String message) {
if (!this.logger.isLoggable(Level.FINER)) {
return;
}
logger.logp(Level.FINER, componentClassName, getCallerMethodName(), message);
}
public void finer(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.FINER)) {
return;
}
logger.logp(Level.FINER, componentClassName, getCallerMethodName(), message, thrown);
}
public void fine(final String message) {
if (!this.logger.isLoggable(Level.FINE)) {
return;
}
logger.logp(Level.FINE, componentClassName, getCallerMethodName(), message);
}
public void fine(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.FINE)) {
return;
}
logger.logp(Level.FINE, componentClassName, getCallerMethodName(), message, thrown);
}
public void info(final String message) {
if (!this.logger.isLoggable(Level.INFO)) {
return;
}
logger.logp(Level.INFO, componentClassName, getCallerMethodName(), message);
}
public void info(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.INFO)) {
return;
}
logger.logp(Level.INFO, componentClassName, getCallerMethodName(), message, thrown);
}
public void config(final String message) {
if (!this.logger.isLoggable(Level.CONFIG)) {
return;
}
logger.logp(Level.CONFIG, componentClassName, getCallerMethodName(), message);
}
public void config(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.CONFIG)) {
return;
}
logger.logp(Level.CONFIG, componentClassName, getCallerMethodName(), message, thrown);
}
public void warning(final String message) {
if (!this.logger.isLoggable(Level.WARNING)) {
return;
}
logger.logp(Level.WARNING, componentClassName, getCallerMethodName(), message);
}
public void warning(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.WARNING)) {
return;
}
logger.logp(Level.WARNING, componentClassName, getCallerMethodName(), message, thrown);
}
public void severe(final String message) {
if (!this.logger.isLoggable(Level.SEVERE)) {
return;
}
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), message);
}
public void severe(final String message, final Throwable thrown) {
if (!this.logger.isLoggable(Level.SEVERE)) {
return;
}
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), message, thrown);
}
public boolean isMethodCallLoggable() {
return this.logger.isLoggable(METHOD_CALL_LEVEL_VALUE);
}
public boolean isLoggable(final Level level) {
return this.logger.isLoggable(level);
}
public void setLevel(final Level level) {
this.logger.setLevel(level);
}
public void entering() {
if (!this.logger.isLoggable(METHOD_CALL_LEVEL_VALUE)) {
return;
}
logger.entering(componentClassName, getCallerMethodName());
}
public void entering(final Object... parameters) {
if (!this.logger.isLoggable(METHOD_CALL_LEVEL_VALUE)) {
return;
}
logger.entering(componentClassName, getCallerMethodName(), parameters);
}
public void exiting() {
if (!this.logger.isLoggable(METHOD_CALL_LEVEL_VALUE)) {
return;
}
logger.exiting(componentClassName, getCallerMethodName());
}
public void exiting(final Object result) {
if (!this.logger.isLoggable(METHOD_CALL_LEVEL_VALUE)) {
return;
}
logger.exiting(componentClassName, getCallerMethodName(), result);
}
/**
* Method logs {@code exception}'s message as a {@code SEVERE} logging level
* message.
* <p/>
* If {@code cause} parameter is not {@code null}, it is logged as well and
* {@code exception} original cause is initialized with instance referenced
* by {@code cause} parameter.
*
* @param exception exception whose message should be logged. Must not be
* {@code null}.
* @param cause initial cause of the exception that should be logged as well
* and set as {@code exception}'s original cause. May be {@code null}.
* @return the same exception instance that was passed in as the {@code exception}
* parameter.
*/
public <T extends Throwable> T logSevereException(final T exception, final Throwable cause) {
if (this.logger.isLoggable(Level.SEVERE)) {
if (cause == null) {
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), exception.getMessage());
} else {
exception.initCause(cause);
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), exception.getMessage(), cause);
}
}
return exception;
}
/**
* Method logs {@code exception}'s message as a {@code SEVERE} logging level
* message.
* <p/>
* If {@code logCause} parameter is {@code true}, {@code exception}'s original
* cause is logged as well (if exists). This may be used in cases when
* {@code exception}'s class provides constructor to initialize the original
* cause. In such case you do not need to use
* {@link #logSevereException(Throwable, Throwable)}
* method version but you might still want to log the original cause as well.
*
* @param exception exception whose message should be logged. Must not be
* {@code null}.
* @param logCause deterimnes whether initial cause of the exception should
* be logged as well
* @return the same exception instance that was passed in as the {@code exception}
* parameter.
*/
public <T extends Throwable> T logSevereException(final T exception, final boolean logCause) {
if (this.logger.isLoggable(Level.SEVERE)) {
if (logCause && exception.getCause() != null) {
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), exception.getMessage(), exception.getCause());
} else {
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), exception.getMessage());
}
}
return exception;
}
/**
* Same as {@link #logSevereException(Throwable, boolean) logSevereException(exception, true)}.
*/
public <T extends Throwable> T logSevereException(final T exception) {
if (this.logger.isLoggable(Level.SEVERE)) {
if (exception.getCause() == null) {
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), exception.getMessage());
} else {
logger.logp(Level.SEVERE, componentClassName, getCallerMethodName(), exception.getMessage(), exception.getCause());
}
}
return exception;
}
/**
* Method logs {@code exception}'s message at the logging level specified by the
* {@code level} argument.
* <p/>
* If {@code cause} parameter is not {@code null}, it is logged as well and
* {@code exception} original cause is initialized with instance referenced
* by {@code cause} parameter.
*
* @param exception exception whose message should be logged. Must not be
* {@code null}.
* @param cause initial cause of the exception that should be logged as well
* and set as {@code exception}'s original cause. May be {@code null}.
* @param level loging level which should be used for logging
* @return the same exception instance that was passed in as the {@code exception}
* parameter.
*/
public <T extends Throwable> T logException(final T exception, final Throwable cause, final Level level) {
if (this.logger.isLoggable(level)) {
if (cause == null) {
logger.logp(level, componentClassName, getCallerMethodName(), exception.getMessage());
} else {
exception.initCause(cause);
logger.logp(level, componentClassName, getCallerMethodName(), exception.getMessage(), cause);
}
}
return exception;
}
/**
* Method logs {@code exception}'s message at the logging level specified by the
* {@code level} argument.
* <p/>
* If {@code logCause} parameter is {@code true}, {@code exception}'s original
* cause is logged as well (if exists). This may be used in cases when
* {@code exception}'s class provides constructor to initialize the original
* cause. In such case you do not need to use
* {@link #logException(Throwable, Throwable, Level) logException(exception, cause, level)}
* method version but you might still want to log the original cause as well.
*
* @param exception exception whose message should be logged. Must not be
* {@code null}.
* @param logCause deterimnes whether initial cause of the exception should
* be logged as well
* @param level loging level which should be used for logging
* @return the same exception instance that was passed in as the {@code exception}
* parameter.
*/
public <T extends Throwable> T logException(final T exception, final boolean logCause, final Level level) {
if (this.logger.isLoggable(level)) {
if (logCause && exception.getCause() != null) {
logger.logp(level, componentClassName, getCallerMethodName(), exception.getMessage(), exception.getCause());
} else {
logger.logp(level, componentClassName, getCallerMethodName(), exception.getMessage());
}
}
return exception;
}
/**
* Same as {@link #logException(Throwable, Throwable, Level)
* logException(exception, true, level)}.
*/
public <T extends Throwable> T logException(final T exception, final Level level) {
if (this.logger.isLoggable(level)) {
if (exception.getCause() == null) {
logger.logp(level, componentClassName, getCallerMethodName(), exception.getMessage());
} else {
logger.logp(level, componentClassName, getCallerMethodName(), exception.getMessage(), exception.getCause());
}
}
return exception;
}
}
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