[CONF] OpenEJB 3.0.x documentation: Singleton Example (page created)

Thu, 07 Aug 2008 02:48:34 -0700

Page Created : OPENEJBx30 : Singleton Example

Singleton Example has been created by David Blevins (Aug 07, 2008).

Content:
/**
 * 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.superbiz.registry;

import static javax.ejb.LockType.READ;
import javax.ejb.Lock;
import javax.ejb.Singleton;
import java.util.HashMap;
import java.util.Map;

@Singleton
public class ComponentRegistryBean implements ComponentRegistry {

    private final Map<Class, Object> components = new HashMap<Class, Object>();

    @Lock(READ)
    public <T> T getComponent(Class<T> type) {
        return (T) components.get(type);
    }

    public <T> T setComponent(Class<T> type, T value) {
        return (T) components.put(type, value);
    }

    public <T> T removeComponent(Class<T> type) {
        return (T) components.remove(type);
    }

}
/**
 * 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.superbiz.registry;

import junit.framework.TestCase;

import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Properties;
import java.util.Date;
import java.net.URI;

public class ComponentRegistryBeanTest extends TestCase {

    public void test() throws Exception {
        Properties props = new Properties();
        props.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.LocalInitialContextFactory");

        InitialContext context = new InitialContext(props);

        ComponentRegistry refOne = (ComponentRegistry) context.lookup("ComponentRegistryBeanLocal");

        ComponentRegistry refTwo = (ComponentRegistry) context.lookup("ComponentRegistryBeanLocal");


        refOne.setComponent(URI.class, new URI("foo://bar/baz"));

        URI uri = refTwo.getComponent(URI.class);

        assertEquals(uri, new URI("foo://bar/baz"));


        Date now = new Date();

        refTwo.setComponent(Date.class, now);

        Date date = refOne.getComponent(Date.class);

        assertEquals(now, date);

    }
}
/**
 * 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.superbiz.registry;

import static javax.ejb.ConcurrencyManagementType.BEAN;
import javax.ejb.Singleton;
import javax.ejb.ConcurrencyManagement;
import java.util.Properties;

@Singleton
@ConcurrencyManagement(BEAN)
public class PropertyRegistryBean implements PropertyRegistry {

    private final Properties properties = new Properties();

    public String getProperty(String key) {
        return properties.getProperty(key);
    }

    public String setProperty(String key, String value) {
        return (String) properties.setProperty(key, value);
    }

    public String removeProperty(String key) {
        return (String) properties.remove(key);
    }

}
/**
 * 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.superbiz.registry;

import junit.framework.TestCase;

import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Properties;

public class PropertiesRegistryBeanTest extends TestCase {

    public void test() throws Exception {
        Properties props = new Properties();
        props.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.LocalInitialContextFactory");

        InitialContext context = new InitialContext(props);

        PropertyRegistry refOne = (PropertyRegistry) context.lookup("PropertyRegistryBeanLocal");

        PropertyRegistry refTwo = (PropertyRegistry) context.lookup("PropertyRegistryBeanLocal");


        refOne.setProperty("url", "http://superbiz.org");

        String url = "" class="code-quote">"url");

        assertEquals("http://superbiz.org", url);


        refTwo.setProperty("version", "1.0.5");

        String version = refOne.getProperty("version");

        assertEquals("1.0.5", version);

    }
}

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