io.helidon.microprofile.tyrus.HelidonComponentProvider Maven / Gradle / Ivy
/*
* Copyright (c) 2020, 2023 Oracle and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.helidon.microprofile.tyrus;
import jakarta.enterprise.context.ApplicationScoped;
import jakarta.enterprise.inject.spi.BeanManager;
import jakarta.enterprise.inject.spi.CDI;
import org.glassfish.tyrus.core.ComponentProvider;
/**
* A service provider for Tyrus to create and destroy beans using CDI. By default,
* and according to the Jakarta WebSocket specification, beans are created and
* destroyed for each client connection (in "connection scope"). However, this provider
* also supports endpoints in {@link ApplicationScoped}. These endpoint instances
* are not destroyed here but at a later time by the CDI container. No other scopes
* are currently supported.
*/
public class HelidonComponentProvider extends ComponentProvider {
/**
* Checks if a bean is known to CDI.
*
* @param c {@link Class} to be checked
* @return outcome of test
*/
@Override
public boolean isApplicable(Class c) {
BeanManager beanManager = CDI.current().getBeanManager();
return beanManager.getBeans(c).size() > 0;
}
/**
* Create a new instance using CDI. Note that if the bean is {@link ApplicationScoped}
* the same instance will be returned every time this method is called.
*
* @param c {@link Class} to be created
* @return new instance
* @param type of new instance
*/
@Override
public Object create(Class c) {
return CDI.current().select(c).get();
}
/**
* Beans are normally scoped to a client connection. However, if a bean is explicitly
* set to be in {@link ApplicationScoped}, it will not be destroyed here.
*
* @param o instance to be destroyed
* @return outcome of operation
*/
@Override
public boolean destroy(Object o) {
try {
if (!o.getClass().isAnnotationPresent(ApplicationScoped.class)) {
CDI.current().destroy(o);
}
} catch (UnsupportedOperationException | IllegalStateException e) {
return false;
}
return true;
}
}