org.rapidpm.ddi.scopes.provided.JVMSingletonInjectionScope Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of rapidpm-dynamic-cdi Show documentation

Dynamic Dependency Injection with different ways to manage the resolver-strategy

There is a newer version: 01.02.00-RPM

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.rapidpm.ddi.scopes.provided;

import org.rapidpm.ddi.scopes.InjectionScope;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class JVMSingletonInjectionScope extends InjectionScope {

  private static final Map SINGLETONS = new ConcurrentHashMap<>();

  @Override
  public  T getInstance(final String clazz) {
    if (SINGLETONS.containsKey(clazz)) {
      return (T) SINGLETONS.get(clazz);
    }
    return null;
  }

  @Override
  public  void storeInstance(final Class targetClassOrInterface, final T instance) {
    final String name = targetClassOrInterface.getName();
    if (SINGLETONS.containsKey(name)) {
      //logging that Singleton was tried to set twice
    } else {
      SINGLETONS.put(name, instance);
    }

  }

  @Override
  public void clear() {
    SINGLETONS.clear();
  }

  @Override
  public String getScopeName() {
    return JVMSingletonInjectionScope.class.getSimpleName();
  }
}