/**
* 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.apache.camel;
/**
* Used for defining if a given class is singleton or not. If the class is a singleton,
* then a single instance will be shared (and hence should be treated as immutable and
* be used in a thread-safe manner).
* <p/>
* This interface is not implemented as a marker interface (i.e., it's necessary to read
* {@link #isSingleton()} instead of <tt>instanceof(IsSingleton))</tt>.
* This allows for subclasses to have a singleton status different from a parent and
* for objects to have this value dynamically changed.
* <p/>
* Camel component is very often singleton based, only a few components is not.
*
* @version
*/
public interface IsSingleton {
/**
* Whether this class supports being singleton or not.
*
* @return <tt>true</tt> to be a single shared instance, <tt>false</tt> to create new instances.
*/
boolean isSingleton();
}