statelesssessionbean.java

SUN的JAVA EE5源代码java_ee_sdk-5_03-preview-samples

/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License).  You may not use this file except in
 * compliance with the License.
 *
 * You can obtain a copy of the license at
 * https://glassfish.dev.java.net/public/CDDLv1.0.html or
 * glassfish/bootstrap/legal/CDDLv1.0.txt.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at glassfish/bootstrap/legal/CDDLv1.0.txt.
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 */
package enterprise.interceptor_stateless_ejb;

import javax.ejb.Stateless;
import javax.interceptor.Interceptors;

// This bean uses two interceptors to validate
// the input to its (only) business method.
// Note that a single interceptor would suffice
// but to demonstrate the use of interceptor
// chaining, we use two interceptors

@Stateless
@Interceptors( { NullChecker.class, ArgumentsChecker.class })
public class StatelessSessionBean
    implements StatelessSession {

    // This business method is called after
    // the above two interceptor's @AroundInvoke
    // methods are invoked. Hence it is guaranteed
    // that the argument to this method is not null
    // and it starts with a letter
    public String initUpperCase(String val) {
        String first = val.substring(0, 1);
        return first.toUpperCase() + val.substring(1);
    }

}