When using a DefaultPicoContainer with a given LifecycleStrategy (which includes a component monitor), the monitor is not automatically set for instances registered in the container. Cut and paste the code below in a file and run the (Junit 3) test: /*

• expose the bug */ package some.package.name;

import java.lang.reflect.Constructor; import junit.framework.TestCase; import org.picocontainer.ComponentAdapter; import org.picocontainer.defaults.ComponentMonitorStrategy; import org.picocontainer.defaults.DefaultPicoContainer; import org.picocontainer.defaults.DelegatingComponentMonitor; import org.picocontainer.defaults.MonitoringComponentAdapter; import org.picocontainer.monitors.DefaultComponentMonitor; public class DefaultPicoContainerTest extends TestCase { public static class Instance { // just a test } public static class LoggingComponentMonitor extends DefaultComponentMonitor { private static int calls = 0; @Override public void instantiating(Constructor constructor) { calls++; } static int getCalls() { return calls; } } public void testCorrectComponentMonitorRegisterImplementation() { LoggingComponentMonitor monitor = new LoggingComponentMonitor(); DefaultPicoContainer container = new DefaultPicoContainer(monitor); ComponentAdapter adapter = container.registerComponentImplementation(Instance.class); assertSame(monitor, ((ComponentMonitorStrategy)adapter).currentMonitor()); } public void testCorrectComponentMonitorRegisterInstance() { LoggingComponentMonitor monitor = new LoggingComponentMonitor(); DefaultPicoContainer container = new DefaultPicoContainer(monitor); ComponentAdapter adapter = container.registerComponentInstance(new Instance()); // direct call fails - this is a delegating component monitor // assertSame(monitor, ((ComponentMonitorStrategy)adapter).currentMonitor()); int count = LoggingComponentMonitor.getCalls(); // however the failing test below proves that the LoggingComponentMonitor is not hit ((ComponentMonitorStrategy)adapter).currentMonitor().instantiating(null); assertEquals(count + 1, LoggingComponentMonitor.getCalls()); } }