Examples with InstanceManager org.apache.tomcat.InstanceManager used on opensource projects

Example 6 with InstanceManager

use of org.apache.tomcat.InstanceManager in project tomcat by apache.

the class JspServletWrapper method getServlet.

public Servlet getServlet() throws ServletException {
    // new servlet object is read consistently)
    if (reload) {
        synchronized (this) {
            // of different pages, but not the same page.
            if (reload) {
                // This is to maintain the original protocol.
                destroy();
                final Servlet servlet;
                try {
                    InstanceManager instanceManager = InstanceManagerFactory.getInstanceManager(config);
                    servlet = (Servlet) instanceManager.newInstance(ctxt.getFQCN(), ctxt.getJspLoader());
                } catch (Exception e) {
                    Throwable t = ExceptionUtils.unwrapInvocationTargetException(e);
                    ExceptionUtils.handleThrowable(t);
                    throw new JasperException(t);
                }
                servlet.init(config);
                if (!firstTime) {
                    ctxt.getRuntimeContext().incrementJspReloadCount();
                }
                theServlet = servlet;
                reload = false;
            // Volatile 'reload' forces in order write of 'theServlet' and new servlet object
            }
        }
    }
    return theServlet;
}

Example 7 with InstanceManager

use of org.apache.tomcat.InstanceManager in project tomcat by apache.

the class TestDefaultInstanceManager method testConcurrency.

/*
     * Performance test. Comment out @Ignore to run the test.
     */
@Ignore
@Test
public void testConcurrency() throws Exception {
    // Create a populated InstanceManager
    Tomcat tomcat = getTomcatInstance();
    Context ctx = tomcat.addContext(null, "", null);
    tomcat.start();
    InstanceManager im = ctx.getInstanceManager();
    for (int i = 1; i < 9; i++) {
        doTestConcurrency(im, i);
    }
}

Example 8 with InstanceManager

use of org.apache.tomcat.InstanceManager in project tomee by apache.

the class JavaEEDefaultServerEnpointConfigurator method getEndpointInstance.

@Override
public <T> T getEndpointInstance(final Class<T> clazz) throws InstantiationException {
    final ClassLoader classLoader = clazz.getClassLoader();
    InstanceManager instanceManager = instanceManagers.get(classLoader);
    if (instanceManager == null) {
        final ClassLoader tccl = Thread.currentThread().getContextClassLoader();
        if (tccl != null) {
            instanceManager = instanceManagers.get(tccl);
        }
    }
    // if we have a single app fallback otherwise we don't have enough contextual information here
    if (instanceManager == null && instanceManagers.size() == 1) {
        instanceManager = instanceManagers.values().iterator().next();
    }
    if (instanceManager == null) {
        return super.getEndpointInstance(clazz);
    }
    try {
        return clazz.cast(instanceManager.newInstance(clazz));
    } catch (final Exception e) {
        if (InstantiationException.class.isInstance(e)) {
            throw InstantiationException.class.cast(e);
        }
        throw new InstantiationException(e.getMessage());
    }
}