Oracle 9i - Java Developer’s Guide
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Extra resources for Oracle 9i - Java Developer’s Guide
SELECT object_name, object_type, status FROM user_objects WHERE object_name LIKE ’%Alerter’; This routine finds any OBJECT_NAME entries that end with the characters: Alerter. 2-24 Java Developer’s Guide User Interfaces on the Server For more information about USER_OBJECTS, see the Oracle9i Java Stored Procedures Developer’s Guide. Publishing Oracle9i enables clients and SQL to invoke Java methods that are loaded within the database, once published. You publish either the object itself or individual methods.
Class lookup is always on behalf of a referencing class through a ClassLoader. The difference between the JDK implementation and the Oracle9i JVM implementation is the method on which the class is found: ■ ■ The JDK uses one ClassLoader that searches the set of directory tree roots specified by the environment variable CLASSPATH. Oracle9i JVM defines several resolvers, which define how to locate classes. Every class has a resolver associated with it, and each class can, potentially, have a different resolver.
Be sure to correctly load the resource files that your classes need. For each interclass reference in a class, the resolver searches the schemas specified by the resolver spec for a valid class schema object that satisfies the reference. If all references are resolved, the resolver marks the class valid. A class that has never been resolved, or has been resolved unsuccessfully, is marked invalid. A class that depends on a schema object that becomes invalid is also marked invalid. To make searching for dependent classes easier, Oracle9i provides a default resolver and resolver spec that searches first the definer’s schema and then PUBLIC.