Examples with ResourceLifecycleManager io.gravitee.gateway.resource.ResourceLifecycleManager used on opensource projects

Example 1 with ResourceLifecycleManager

use of io.gravitee.gateway.resource.ResourceLifecycleManager in project gravitee-gateway by gravitee-io.

the class DefaultPolicyManager method initialize.

private void initialize() {
    PolicyPluginManager ppm = applicationContext.getBean(PolicyPluginManager.class);
    PolicyClassLoaderFactory pclf = applicationContext.getBean(PolicyClassLoaderFactory.class);
    ReactorHandler rh = applicationContext.getBean(ReactorHandler.class);
    ResourceLifecycleManager rm = applicationContext.getBean(ResourceLifecycleManager.class);
    Reactable reactable = rh.reactable();
    Set<Policy> requiredPlugins = reactable.dependencies(Policy.class);
    requiredPlugins.forEach(policy -> {
        final PolicyPlugin policyPlugin = ppm.get(policy.getName());
        if (policyPlugin == null) {
            logger.error("Policy [{}] can not be found in policy registry", policy.getName());
            throw new IllegalStateException("Policy [" + policy.getName() + "] can not be found in policy registry");
        }
        PluginClassLoader policyClassLoader = null;
        // Load dependant resources to enhance policy classloader
        Collection<? extends Resource> resources = rm.getResources();
        if (!resources.isEmpty()) {
            ClassLoader[] resourceClassLoaders = rm.getResources().stream().map(new Function<Resource, ClassLoader>() {

                @Override
                public ClassLoader apply(Resource resource) {
                    return resource.getClass().getClassLoader();
                }
            }).toArray(ClassLoader[]::new);
            DelegatingClassLoader parentClassLoader = new DelegatingClassLoader(rh.classloader(), resourceClassLoaders);
            policyClassLoader = pclf.getOrCreateClassLoader(policyPlugin, parentClassLoader);
        } else {
            policyClassLoader = pclf.getOrCreateClassLoader(policyPlugin, rh.classloader());
        }
        logger.debug("Loading policy {} for {}", policy.getName(), rh);
        PolicyMetadataBuilder builder = new PolicyMetadataBuilder();
        builder.setId(policyPlugin.id());
        try {
            // Prepare metadata
            Class<?> policyClass = ClassUtils.forName(policyPlugin.policy().getName(), policyClassLoader);
            builder.setPolicy(policyClass).setMethods(new PolicyMethodResolver().resolve(policyClass));
            if (policyPlugin.configuration() != null) {
                builder.setConfiguration((Class<? extends PolicyConfiguration>) ClassUtils.forName(policyPlugin.configuration().getName(), policyClassLoader));
            }
            // Prepare context if defined
            if (policyPlugin.context() != null) {
                Class<? extends PolicyContext> policyContextClass = (Class<? extends PolicyContext>) ClassUtils.forName(policyPlugin.context().getName(), policyClassLoader);
                // Create policy context instance and initialize context provider (if used)
                PolicyContext context = new PolicyContextFactory(reactable).create(policyContextClass);
                builder.setContext(context);
            }
            RegisteredPolicy registeredPolicy = new RegisteredPolicy();
            registeredPolicy.classLoader = policyClassLoader;
            registeredPolicy.metadata = builder.build();
            policies.put(policy.getName(), registeredPolicy);
        } catch (Exception ex) {
            logger.error("Unable to load policy metadata", ex);
            if (policyClassLoader != null) {
                try {
                    policyClassLoader.close();
                } catch (IOException ioe) {
                    logger.error("Unable to close classloader for policy", ioe);
                }
            }
        }
    });
}