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.injectors.AbstractInjector;
030    
031    /**
032     * A {@link ComponentMonitor} which writes to a {@link Writer}. 
033     * 
034     * @author Paul Hammant
035     * @author Aslak Hellesøy
036     * @author Mauro Talevi
037     */
038    public class WriterComponentMonitor implements ComponentMonitor {
039    
040        private final PrintWriter out;
041        private final ComponentMonitor delegate;
042    
043        public WriterComponentMonitor(Writer out) {
044            this(out, new NullComponentMonitor());
045        }
046    
047        public WriterComponentMonitor(Writer out, ComponentMonitor delegate) {
048            this.out = new PrintWriter(out);
049            this.delegate = delegate;
050        }
051    
052        public <T> Constructor<T> instantiating(PicoContainer container, ComponentAdapter<T> componentAdapter,
053                                         Constructor<T> constructor) {
054            out.println(format(ComponentMonitorHelper.INSTANTIATING, ctorToString(constructor)));
055            return delegate.instantiating(container, componentAdapter, constructor);
056        }
057    
058        public <T> void instantiated(PicoContainer container, ComponentAdapter<T> componentAdapter,
059                                 Constructor<T> constructor,
060                                 Object instantiated,
061                                 Object[] injected,
062                                 long duration) {
063            out.println(format(ComponentMonitorHelper.INSTANTIATED, ctorToString(constructor), duration, instantiated.getClass().getName(), parmsToString(injected)));
064            delegate.instantiated(container, componentAdapter, constructor, instantiated, injected, duration);
065        }
066    
067        public <T> void instantiationFailed(PicoContainer container,
068                                        ComponentAdapter<T> componentAdapter,
069                                        Constructor<T> constructor,
070                                        Exception cause) {
071            out.println(format(ComponentMonitorHelper.INSTANTIATION_FAILED, ctorToString(constructor), cause.getMessage()));
072            delegate.instantiationFailed(container, null, constructor, cause);
073        }
074    
075        public void invoking(PicoContainer container,
076                             ComponentAdapter<?> componentAdapter,
077                             Member member,
078                             Object instance) {
079            out.println(format(ComponentMonitorHelper.INVOKING, memberToString(member), instance));
080            delegate.invoking(container, componentAdapter, member, instance);
081        }
082    
083        public void invoked(PicoContainer container,
084                            ComponentAdapter<?> componentAdapter,
085                            Method method,
086                            Object instance,
087                            long duration) {
088            out.println(format(ComponentMonitorHelper.INVOKED, methodToString(method), instance, duration));
089            delegate.invoked(container, componentAdapter, method, instance, duration);
090        }
091    
092        public void invocationFailed(Member member, Object instance, Exception cause) {
093            out.println(format(ComponentMonitorHelper.INVOCATION_FAILED, memberToString(member), instance, cause.getMessage()));
094            delegate.invocationFailed(member, instance, cause);
095        }
096    
097        public void lifecycleInvocationFailed(MutablePicoContainer container,
098                                              ComponentAdapter<?> componentAdapter, Method method,
099                                              Object instance,
100                                              RuntimeException cause) {
101            out.println(format(ComponentMonitorHelper.LIFECYCLE_INVOCATION_FAILED, methodToString(method), instance, cause.getMessage()));
102            delegate.lifecycleInvocationFailed(container, componentAdapter, method, instance, cause);
103        }
104    
105        public Object noComponentFound(MutablePicoContainer container, Object componentKey) {
106            out.println(format(ComponentMonitorHelper.NO_COMPONENT, componentKey));
107            return delegate.noComponentFound(container, componentKey);
108        }
109    
110        public AbstractInjector newInjectionFactory(AbstractInjector abstractInjector) {
111            return delegate.newInjectionFactory(abstractInjector);
112        }
113    }