CheckServiceProviderHelper.java

/*
 * 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.felix.ipojo.handler.temporal.components.proxy;

import org.apache.felix.ipojo.handler.temporal.services.CheckService;
import org.apache.felix.ipojo.handler.temporal.services.FooService;

import java.util.Properties;

public class CheckServiceProviderHelper implements CheckService {
    
    /**
     * injected dependency.
     */
    private FooService fs;
    
    public CheckServiceProviderHelper(FooService svc) {
        fs = svc;
    }

    public boolean check() {
        if (fs != null) { // Cannot be null
            try {
                return fs.foo();
            } catch (RuntimeException e) { // Now it's a runtime exception (FELIX-2472)
                // Can throw a RTE for null policy and for time out
                if (e.getMessage().equals("No service available")) {
                    // Has detected a null policy.
                    System.out.println(e.getMessage());
                    return false;
                } else {
                    // Timeout
                    // Propagate the exception
                    throw e;
                }
            }
        }
        return false;
    }

    public Properties getProps() {
        if (fs != null) {
            return fs.fooProps();
        }
        return null;
    }

}