// Utility function to clean up objects, exceptions or not,
// containers and environments must be closed.
private static void cleanup(myDbEnv env, XmlContainer openedContainer) {
try {
if (openedContainer != null) openedContainer.delete();
if (env != null) env.cleanup();
} catch (Exception e) {
// ignore exceptions on close
}
}
// Method used to replace an index with a new index type
private static void replaceAnIndex(
XmlManager mgr,
XmlContainer container,
String URI,
String nodeName,
String indexType,
XmlTransaction txn)
throws Throwable {
System.out.println("Replacing index specification " + indexType + " for node " + nodeName);
// Retrieve the index specification from the container
XmlIndexSpecification idxSpec = container.getIndexSpecification(txn);
// See what indexes exist on the container
int count = 0;
System.out.println("Before index replacement.");
XmlIndexDeclaration idxDecl = null;
while ((idxDecl = (idxSpec.next())) != null) {
System.out.println(
"\tFor node '" + idxDecl.name + "', found index: '" + idxDecl.index + "'.");
count++;
}
System.out.println(count + " indexes found.");
// Replace the container's index specification with a new specification
idxSpec.replaceIndex(URI, nodeName, indexType);
// Set the specification back to the container
container.setIndexSpecification(txn, idxSpec, mgr.createUpdateContext());
// Look at the indexes again to make sure our replacement took.
count = 0;
idxSpec.reset();
System.out.println("After index replacement.");
while ((idxDecl = (idxSpec.next())) != null) {
System.out.println(
"\tFor node '" + idxDecl.name + "', found index: '" + idxDecl.index + "'.");
count++;
}
System.out.println(count + " indexes found.");
idxSpec.delete();
}