Examples with DatasetInstantiationException co.cask.cdap.api.data.DatasetInstantiationException used on opensource projects

Example 1 with DatasetInstantiationException

use of co.cask.cdap.api.data.DatasetInstantiationException in project cdap by caskdata.

the class MapReduceProgramRunnerTest method testWordCount.

@Test
public void testWordCount() throws Exception {
    // deploy to namespace default by default
    final ApplicationWithPrograms app = deployApp(AppWithMapReduce.class);
    final String inputPath = createInput();
    final java.io.File outputDir = new java.io.File(TEMP_FOLDER.newFolder(), "output");
    try {
        datasetCache.getDataset("someOtherNameSpace", "jobConfig");
        Assert.fail("getDataset() should throw an exception when accessing a non-existing dataset.");
    } catch (DatasetInstantiationException e) {
    // expected
    }
    // Should work if explicitly specify the default namespace
    final KeyValueTable jobConfigTable = datasetCache.getDataset(NamespaceId.DEFAULT.getNamespace(), "jobConfig");
    // write config into dataset
    Transactions.createTransactionExecutor(txExecutorFactory, jobConfigTable).execute(new TransactionExecutor.Subroutine() {

        @Override
        public void apply() {
            jobConfigTable.write(Bytes.toBytes("inputPath"), Bytes.toBytes(inputPath));
            jobConfigTable.write(Bytes.toBytes("outputPath"), Bytes.toBytes(outputDir.getPath()));
        }
    });
    runProgram(app, AppWithMapReduce.ClassicWordCount.class, false, true);
    Assert.assertEquals("true", System.getProperty("partitioner.initialize"));
    Assert.assertEquals("true", System.getProperty("partitioner.destroy"));
    Assert.assertEquals("true", System.getProperty("partitioner.set.conf"));
    Assert.assertEquals("true", System.getProperty("comparator.initialize"));
    Assert.assertEquals("true", System.getProperty("comparator.destroy"));
    Assert.assertEquals("true", System.getProperty("comparator.set.conf"));
    File[] outputFiles = outputDir.listFiles(new FilenameFilter() {

        @Override
        public boolean accept(File dir, String name) {
            return name.startsWith("part-r-") && !name.endsWith(".crc");
        }
    });
    Assert.assertNotNull("no output files found", outputFiles);
    int lines = 0;
    for (File file : outputFiles) {
        lines += Files.readLines(file, Charsets.UTF_8).size();
    }
    // dummy check that output file is not empty
    Assert.assertTrue(lines > 0);
}

Example 2 with DatasetInstantiationException

use of co.cask.cdap.api.data.DatasetInstantiationException in project cdap by caskdata.

the class MapReduceProgramRunnerTest method testMapreduceWithObjectStore.

@Test
public void testMapreduceWithObjectStore() throws Exception {
    // Deploy apps to another namespace and test cross-namespace access meanwhile
    final ApplicationWithPrograms app = deployApp(new NamespaceId("someOtherNameSpace").toId(), AppWithMapReduceUsingObjectStore.class);
    final ObjectStore<String> input = datasetCache.getDataset("someOtherNameSpace", "keys");
    // Get dataset from a non existing namespace
    try {
        datasetCache.getDataset("nonExistingNameSpace", "keys");
        Assert.fail("getDataset() should throw an exception when accessing dataset from a non-existing namespace.");
    } catch (DatasetInstantiationException e) {
    // expected
    }
    final String testString = "persisted data";
    //Populate some input
    Transactions.createTransactionExecutor(txExecutorFactory, (TransactionAware) input).execute(new TransactionExecutor.Subroutine() {

        @Override
        public void apply() {
            input.write(Bytes.toBytes(testString), testString);
            input.write(Bytes.toBytes("distributed systems"), "distributed systems");
        }
    });
    runProgram(app, AppWithMapReduceUsingObjectStore.ComputeCounts.class, false, true);
    final KeyValueTable output = datasetCache.getDataset("someOtherNameSpace", "count");
    //read output and verify result
    Transactions.createTransactionExecutor(txExecutorFactory, output).execute(new TransactionExecutor.Subroutine() {

        @Override
        public void apply() {
            byte[] val = output.read(Bytes.toBytes(testString));
            Assert.assertTrue(val != null);
            Assert.assertEquals(Bytes.toString(val), Integer.toString(testString.length()));
            val = output.read(Bytes.toBytes("distributed systems"));
            Assert.assertTrue(val != null);
            Assert.assertEquals(Bytes.toString(val), "19");
        }
    });
}

Example 3 with DatasetInstantiationException

use of co.cask.cdap.api.data.DatasetInstantiationException in project cdap by caskdata.

the class SingleThreadDatasetCache method getDataset.

@Override
public <T extends Dataset> T getDataset(DatasetCacheKey key, boolean bypass) throws DatasetInstantiationException {
    Dataset dataset;
    try {
        if (bypass) {
            dataset = datasetLoader.load(key);
        } else {
            try {
                dataset = datasetCache.get(key);
            } catch (ExecutionException | UncheckedExecutionException e) {
                throw e.getCause();
            }
        }
    } catch (DatasetInstantiationException | ServiceUnavailableException e) {
        throw e;
    } catch (Throwable t) {
        throw new DatasetInstantiationException(String.format("Could not instantiate dataset '%s:%s'", key.getNamespace(), key.getName()), t);
    }
    // make sure the dataset exists and is of the right type
    if (dataset == null) {
        throw new DatasetInstantiationException(String.format("Dataset '%s' does not exist", key.getName()));
    }
    T typedDataset;
    try {
        @SuppressWarnings("unchecked") T t = (T) dataset;
        typedDataset = t;
    } catch (Throwable t) {
        // must be ClassCastException
        throw new DatasetInstantiationException(String.format("Could not cast dataset '%s' to requested type. Actual type is %s.", key.getName(), dataset.getClass().getName()), t);
    }
    // any transaction aware that is not in the active tx-awares is added to the current tx context (if there is one).
    if (!bypass && dataset instanceof TransactionAware) {
        TransactionAware txAware = (TransactionAware) dataset;
        TransactionAware existing = activeTxAwares.get(key);
        if (existing == null) {
            activeTxAwares.put(key, txAware);
            if (txContext != null) {
                txContext.addTransactionAware(txAware);
            }
        } else if (existing != dataset) {
            // this better be the same dataset, otherwise the cache did not work
            throw new IllegalStateException(String.format("Unexpected state: Cache returned %s for %s, which is different from the " + "active transaction aware %s for the same key. This should never happen.", dataset, key, existing));
        }
    }
    return typedDataset;
}