@Override
	public String intercept(ActionInvocation invocation) throws Exception { // NOPMD
		// cette méthode est appelée par struts
		if (DISABLED || !STRUTS_COUNTER.isDisplayed()) {
			return invocation.invoke();
		}
		boolean systemError = false;
		try {
			// Requested action name.
			final String actionName = getRequestName(invocation);

			STRUTS_COUNTER.bindContextIncludingCpu(actionName);
			return invocation.invoke();
		} catch (final Error e) {
			// on catche Error pour avoir les erreurs systèmes
			// mais pas Exception qui sont fonctionnelles en général
			systemError = true;
			throw e;
		} finally {
			// on enregistre la requête dans les statistiques
			STRUTS_COUNTER.addRequestForCurrentContext(systemError);
		}
	}
@Test
	public void testStruts() throws Exception {
		final Counter strutsCounter = MonitoringProxy.getStrutsCounter();
		strutsCounter.clear();
		final StrutsInterceptor strutsInterceptor = new StrutsInterceptor();
		final ActionInvocation invocation = createNiceMock(ActionInvocation.class);
		final MockActionProxy proxy = new MockActionProxy();
		proxy.setInvocation(invocation);
		proxy.setActionName("test.action");
		proxy.setMethod(null);
		proxy.setNamespace("testnamespace");
		expect(invocation.getProxy()).andReturn(proxy).anyTimes();

		replay(invocation);
		strutsCounter.setDisplayed(false);
		strutsInterceptor.intercept(invocation);
		final String requestsCount = "requestsCount";
		assertSame(requestsCount, 0, strutsCounter.getRequestsCount());

		strutsCounter.setDisplayed(true);
		strutsInterceptor.intercept(invocation);
		assertSame(requestsCount, 1, strutsCounter.getRequestsCount());
		verify(invocation);

		final ActionInvocation invocation2 = createNiceMock(ActionInvocation.class);
		final MockActionProxy proxy2 = new MockActionProxy();
		proxy2.setInvocation(invocation2);
		proxy2.setActionName("test2.action");
		proxy2.setMethod("execute");
		proxy2.setNamespace("testnamespace");
		expect(invocation2.getProxy()).andReturn(proxy2).anyTimes();

		replay(invocation2);
		strutsInterceptor.intercept(invocation2);
		assertSame(requestsCount, 2, strutsCounter.getRequestsCount());
		verify(invocation2);

		final ActionInvocation invocation3 = createNiceMock(ActionInvocation.class);
		final MockActionProxy proxy3 = new MockActionProxy();
		proxy3.setInvocation(invocation3);
		proxy3.setActionName("test3.action");
		proxy3.setMethod("testmethod");
		proxy3.setNamespace("testnamespace");
		expect(invocation3.getProxy()).andReturn(proxy3).anyTimes();
		expect(invocation3.invoke()).andThrow(new UnknownError("test d'erreur")).anyTimes();

		replay(invocation3);
		try {
			strutsInterceptor.intercept(invocation3);
		} catch (final UnknownError e) {
			assertNotNull("ok", e);
		}
		assertSame(requestsCount, 3, strutsCounter.getRequestsCount());
		verify(invocation3);
	}