    001    /*****************************************************************************
    002     * Copyright (C) PicoContainer Organization. All rights reserved.            *
    003     * ------------------------------------------------------------------------- *
    004     * The software in this package is published under the terms of the BSD      *
    005     * style license a copy of which has been included with this distribution in *
    006     * the LICENSE.txt file.                                                     *
    007     *                                                                           *
    008     * Original code by Paul Hammaant                                            *
    009     *****************************************************************************/
    010
    011    package org.picocontainer.monitors;
    012
    013    import static org.picocontainer.monitors.ComponentMonitorHelper.ctorToString;
    014    import static org.picocontainer.monitors.ComponentMonitorHelper.format;
    015    import static org.picocontainer.monitors.ComponentMonitorHelper.memberToString;
    016    import static org.picocontainer.monitors.ComponentMonitorHelper.methodToString;
    017    import static org.picocontainer.monitors.ComponentMonitorHelper.parmsToString;
    018
    019    import java.io.PrintWriter;
    020    import java.io.Writer;
    021    import java.lang.reflect.Constructor;
    022    import java.lang.reflect.Member;
    023    import java.lang.reflect.Method;
    024
    025    import org.picocontainer.ComponentAdapter;
    026    import org.picocontainer.ComponentMonitor;
    027    import org.picocontainer.MutablePicoContainer;
    028    import org.picocontainer.PicoContainer;
    029    import org.picocontainer.Injector;
    030    import org.picocontainer.Behavior;
    031
    032    /**
    033     * A {@link ComponentMonitor} which writes to a {@link Writer}.
    034     *
    035     * @author Paul Hammant
    036     * @author Aslak Helles&oslash;y
    037     * @author Mauro Talevi
    038     */
    039    public class WriterComponentMonitor implements ComponentMonitor {
    040
    041        private final PrintWriter out;
    042        private final ComponentMonitor delegate;
    043
    044        public WriterComponentMonitor(Writer out) {
    045            this(out, new NullComponentMonitor());
    046        }
    047
    048        public WriterComponentMonitor(Writer out, ComponentMonitor delegate) {
    049            this.out = new PrintWriter(out);
    050            this.delegate = delegate;
    051        }
    052
    053        public <T> Constructor<T> instantiating(PicoContainer container, ComponentAdapter<T> componentAdapter,
    054                                         Constructor<T> constructor) {
    055            out.println(format(ComponentMonitorHelper.INSTANTIATING, ctorToString(constructor)));
    056            return delegate.instantiating(container, componentAdapter, constructor);
    057        }
    058
    059        public <T> void instantiated(PicoContainer container, ComponentAdapter<T> componentAdapter,
    060                                 Constructor<T> constructor,
    061                                 Object instantiated,
    062                                 Object[] injected,
    063                                 long duration) {
    064            out.println(format(ComponentMonitorHelper.INSTANTIATED, ctorToString(constructor), duration, instantiated.getClass().getName(), parmsToString(injected)));
    065            delegate.instantiated(container, componentAdapter, constructor, instantiated, injected, duration);
    066        }
    067
    068        public <T> void instantiationFailed(PicoContainer container,
    069                                        ComponentAdapter<T> componentAdapter,
    070                                        Constructor<T> constructor,
    071                                        Exception cause) {
    072            out.println(format(ComponentMonitorHelper.INSTANTIATION_FAILED, ctorToString(constructor), cause.getMessage()));
    073            delegate.instantiationFailed(container, null, constructor, cause);
    074        }
    075
    076        public Object invoking(PicoContainer container,
    077                               ComponentAdapter<?> componentAdapter,
    078                               Member member,
    079                               Object instance, Object[] args) {
    080            out.println(format(ComponentMonitorHelper.INVOKING, memberToString(member), instance));
    081            return delegate.invoking(container, componentAdapter, member, instance, args);
    082        }
    083
    084        public void invoked(PicoContainer container,
    085                            ComponentAdapter<?> componentAdapter,
    086                            Member member,
    087                            Object instance,
    088                            long duration, Object[] args, Object retVal) {
    089            out.println(format(ComponentMonitorHelper.INVOKED, methodToString(member), instance, duration));
    090            delegate.invoked(container, componentAdapter, member, instance, duration, args, retVal);
    091        }
    092
    093        public void invocationFailed(Member member, Object instance, Exception cause) {
    094            out.println(format(ComponentMonitorHelper.INVOCATION_FAILED, memberToString(member), instance, cause.getMessage()));
    095            delegate.invocationFailed(member, instance, cause);
    096        }
    097
    098        public void lifecycleInvocationFailed(MutablePicoContainer container,
    099                                              ComponentAdapter<?> componentAdapter, Method method,
    100                                              Object instance,
    101                                              RuntimeException cause) {
    102            out.println(format(ComponentMonitorHelper.LIFECYCLE_INVOCATION_FAILED, methodToString(method), instance, cause.getMessage()));
    103            delegate.lifecycleInvocationFailed(container, componentAdapter, method, instance, cause);
    104        }
    105
    106        public Object noComponentFound(MutablePicoContainer container, Object componentKey) {
    107            out.println(format(ComponentMonitorHelper.NO_COMPONENT, componentKey));
    108            return delegate.noComponentFound(container, componentKey);
    109        }
    110
    111        public Injector newInjector(Injector injector) {
    112            return delegate.newInjector(injector);
    113        }
    114
    115        /** {@inheritDoc} **/
    116        public Behavior newBehavior(Behavior behavior) {
    117            return delegate.newBehavior(behavior);
    118        }
    119
    120
    121    }