Example usage for javax.ejb SessionContext lookup

Introduction

In this page you can find the example usage for javax.ejb SessionContext lookup.

Prototype

Object lookup(String name) throws IllegalArgumentException;

Source Link

Document

Lookup a resource within the java: namespace.

Usage

From source file:org.jboss.ejb3.examples.ch05.encryption.EncryptionBean.java

/**
 * Obtains the environment entry with the specified name, casting to a String,
 * and returning the result.  If the entry is not assignable 
 * to a String, an {@link IllegalStateException} will be raised.  In the event that the 
 * specified environment entry cannot be found, a warning message will be logged
 * and we'll return null./*w ww  . j  a  va  2 s  . co m*/
 * 
 * @param envEntryName
 * @return
 * @throws IllegalStateException
 */
private String getEnvironmentEntryAsString(final String envEntryName) throws IllegalStateException {
    // See if we have a SessionContext
    final SessionContext context = this.context;
    if (context == null) {
        log.warning("No SessionContext, bypassing request to obtain environment entry: " + envEntryName);
        return null;
    }

    // Lookup in the Private JNDI ENC via the injected SessionContext
    Object lookupValue = null;
    try {
        lookupValue = context.lookup(envEntryName);
        log.fine("Obtained environment entry \"" + envEntryName + "\": " + lookupValue);
    } catch (final IllegalArgumentException iae) {
        // Not found defined within this EJB's Component Environment, 
        // so return null and let the caller handle it
        log.warning("Could not find environment entry with name: " + envEntryName);
        return null;
    }

    // Cast
    String returnValue = null;
    try {
        returnValue = String.class.cast(lookupValue);
    } catch (final ClassCastException cce) {
        throw new IllegalStateException("The specified environment entry, " + lookupValue
                + ", was not able to be represented as a " + String.class.getName(), cce);
    }

    // Return
    return returnValue;
}

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