Examples of XCommand

org.apache.oozie.command.XCommand

Base class for synchronous and asynchronous commands.

It enables by API the following pattern:

single execution: a command instance can be executed only once
eager data loading: loads data for eager precondition check
eager precondition check: verify precondition before obtaining lock
data loading: loads data for precondition check and execution
precondition check: verifies precondition for execution is still met
locking: obtains exclusive lock on key before executing the command
execution: command logic

It has built in instrumentation and logging.

        assertTrue(intCallable.executed > 0);
        assertTrue(intCallable.executed > callables.get(5).executed);
    }


    public void testRemoveUniqueCallables() throws Exception {
        XCommand command = new XCommand("Test", "type", 100) {
            @Override
            protected boolean isLockRequired() {
                return false;
            }

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Examples of XCommand

Examples of org.apache.oozie.command.XCommand