Examples of org.voltdb.VoltProcedure

org.voltdb.VoltProcedure
Wraps the stored procedure object created by the user with metadata available at runtime. This is used to call the procedure. VoltProcedure is extended by all running stored procedures. Consider this when specifying access privileges.

            this.args[i] = ParameterSet.EMPTY;
            this.stmtCounters[i] = i;
            i++;
        } // FOR


        VoltProcedure volt_proc = ClassUtil.newInstance(TARGET_PROCEDURE, new Object[0], new Class<?>[0]);
        assert(volt_proc != null);
        this.executor = new MockPartitionExecutor(BASE_PARTITION, catalogContext, p_estimator);
        volt_proc.init(this.executor, catalog_proc, BackendTarget.NONE);
        
        this.planner = new BatchPlanner(this.batch, this.catalog_proc, p_estimator);
    }

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        this.proc_class = p_class;


    }
    @Override
    public VoltProcedure makeObjectImpl() throws Exception {
        VoltProcedure volt_proc = null;
        try {
            if (this.has_java) {
                volt_proc = (VoltProcedure)this.proc_class.newInstance();
            } else {
                volt_proc = new VoltProcedure.StmtProcedure();
            }
            volt_proc.init(this.executor,
                           this.catalog_proc,
                           this.executor.getBackendTarget());
        } catch (Exception e) {
            LOG.error("Failed to created VoltProcedure instance for " + catalog_proc.getName() , e);
            throw e;

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                // info.reduceEmitTable = annotationInfo.reduceEmitTable();
            }
        }
        assert (info != null);


        VoltProcedure procInstance = null;
        try {
            procInstance = (VoltProcedure) procClass.newInstance();
        } catch (InstantiationException e1) {
            e1.printStackTrace();
        } catch (IllegalAccessException e1) {

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    protected void initializeVoltProcedures() {
        // load up all the stored procedures
        for (final Procedure catalog_proc : catalogContext.procedures) {
            VoltProcedure volt_proc = this.initializeVoltProcedure(catalog_proc);
            Queue<VoltProcedure> queue = new LinkedList<VoltProcedure>();
            queue.add(volt_proc);
            this.procedures[catalog_proc.getId()] = queue;
        } // FOR
    }

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        } // FOR
    }


    @SuppressWarnings("unchecked")
    protected VoltProcedure initializeVoltProcedure(Procedure catalog_proc) {
        VoltProcedure volt_proc = null;
        
        if (catalog_proc.getHasjava()) {
            // Only try to load the Java class file for the SP if it has one
            Class<? extends VoltProcedure> p_class = null;
            final String className = catalog_proc.getClassname();
            try {
                p_class = (Class<? extends VoltProcedure>)Class.forName(className);
                volt_proc = (VoltProcedure)p_class.newInstance();
            } catch (Exception e) {
                throw new ServerFaultException("Failed to created VoltProcedure instance for " + catalog_proc.getName() , e);
            }
            
        } else {
            volt_proc = new VoltProcedure.StmtProcedure();
        }
        volt_proc.init(this, catalog_proc, this.backend_target);
        return (volt_proc);
    }

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     * <B>Note:</B> You will get a new VoltProcedure for each invocation
     * @param proc_name
     * @return
     */
    protected VoltProcedure getVoltProcedure(int proc_id) {
        VoltProcedure voltProc = this.procedures[proc_id].poll();
        if (voltProc == null) {
            Procedure catalog_proc = catalogContext.getProcedureById(proc_id);
            voltProc = this.initializeVoltProcedure(catalog_proc);
        }
        return (voltProc);

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        // Make sure the dependency tracker knows about us
        if (ts.hasDependencyTracker()) this.depTracker.addTransaction(ts);
        
        // Grab a VoltProcedure handle for this txn
        // Two txns can't use the same VoltProcedure at the same time.
        VoltProcedure volt_proc = this.getVoltProcedure(ts.getProcedure().getId());
        assert(volt_proc != null) : "No VoltProcedure for " + ts;
        
        if (debug.val) {
            LOG.debug(String.format("%s - Starting execution of txn on partition %d " +
                      "[txnMode=%s, mode=%s]",
                      ts, this.partitionId, before_mode, this.currentExecMode));
            if (trace.val)
                LOG.trace(String.format("Current Transaction at partition #%d\n%s",
                          this.partitionId, ts.debug()));
        }
        
        if (hstore_conf.site.txn_counters) TransactionCounter.EXECUTED.inc(ts.getProcedure());
        ClientResponseImpl cresponse = null;
        VoltProcedure previous = this.currentVoltProc;
        try {
            this.currentVoltProc = volt_proc;
            ts.markControlCodeExecuted();
            cresponse = volt_proc.call(ts, ts.getProcedureParameters().toArray()); // Blocking...
        // VoltProcedure.call() should handle any exceptions thrown by the transaction

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                    args[i][ii] = VoltProcedure.getCleanParams(batch[i][ii], query_trace.getParams());
                } // FOR
            } // FOR
        }
        
        VoltProcedure volt_proc = ClassUtil.newInstance(TARGET_PROCEDURE, new Object[0], new Class<?>[0]);
        assert(volt_proc != null);
        this.executor = new MockPartitionExecutor(BASE_PARTITION, catalogContext, p_estimator);
        volt_proc.init(this.executor, catalog_proc, BackendTarget.NONE);
    }

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    /**
     * testGetVoltProcedure
     */
    @Test
    public void testGetVoltProcedure() {
        VoltProcedure volt_proc0 = executor.getVoltProcedure(catalog_proc.getId());
        assertNotNull(volt_proc0);
    }

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    public void testMultipleGetVoltProcedure() {
        // Invoke getVoltProcedure() multiple times and make sure that we never get back the same handle
        int count = 10;
        Set<VoltProcedure> procs = new HashSet<VoltProcedure>();
        for (int i = 0; i < count; i++) {
            VoltProcedure volt_proc = executor.getVoltProcedure(catalog_proc.getId());
            assertNotNull(volt_proc);
            assertFalse(procs.contains(volt_proc));
            procs.add(volt_proc);
        } // FOR
        assertEquals(count, procs.size());

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Related Classes of org.voltdb.VoltProcedure

edu.brown.hstore.PartitionExecutor

edu.brown.hstore.TestBatchPlannerComplex

edu.brown.hstore.TestBatchPlannerUtil

edu.brown.hstore.TestPartitionExecutor

edu.brown.hstore.util.VoltProcedureFactory

edu.brown.HStoreSiteTestUtil

org.voltdb.catalog.PlanFragment

org.voltdb.catalog.ProcParameter

org.voltdb.catalog.Statement

org.voltdb.catalog.StmtParameter

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