Examples with DatasetRepository com.cloudera.cdk.data.DatasetRepository used on opensource projects

Example 16 with DatasetRepository

use of com.cloudera.cdk.data.DatasetRepository in project cdk-examples by cloudera.

the class GenerateSimpleLogs method run.

@Override
public int run(String[] args) throws Exception {
    // going to generate a lot of random log messages
    final Random rand = new Random();
    // open the repository
    final DatasetRepository repo = DatasetRepositories.open("repo:file:/tmp/data");
    // data is written to the staging dataset
    final Dataset<GenericRecord> staging = repo.load("logs-staging");
    final DatasetWriter<GenericRecord> writer = staging.newWriter();
    // this is going to build our simple log records
    final GenericRecordBuilder builder = new GenericRecordBuilder(staging.getDescriptor().getSchema());
    // generate timestamps 1 second apart starting... now
    final Calendar now = Calendar.getInstance();
    final long yesterday = now.getTimeInMillis() - DAY_IN_MILLIS;
    try {
        writer.open();
        // this is a little less than 24 hours worth of messages
        for (int second : Ranges.closed(0, 15000).asSet(DiscreteDomains.integers())) {
            LOG.info("Generating log message " + second);
            builder.set("timestamp", yesterday + second * 5000);
            builder.set("component", "GenerateSimpleLogs");
            int level = rand.nextInt(LOG_LEVELS.length);
            builder.set("level", LOG_LEVELS[level]);
            builder.set("message", LOG_MESSAGES[level]);
            writer.write(builder.build());
        }
    } finally {
        writer.flush();
        writer.close();
    }
    return 0;
}

Example 17 with DatasetRepository

use of com.cloudera.cdk.data.DatasetRepository in project cdk-examples by cloudera.

the class CreateUserDatasetGeneric method run.

@Override
public int run(String[] args) throws Exception {
    // Construct a filesystem dataset repository rooted at /tmp/data
    DatasetRepository repo = DatasetRepositories.open("repo:hdfs:/tmp/data");
    // Create a dataset of users with the Avro schema in the repository
    DatasetDescriptor descriptor = new DatasetDescriptor.Builder().schemaUri("resource:user.avsc").build();
    Dataset<GenericRecord> users = repo.create("users", descriptor);
    // Get a writer for the dataset and write some users to it
    DatasetWriter<GenericRecord> writer = users.newWriter();
    try {
        writer.open();
        String[] colors = { "green", "blue", "pink", "brown", "yellow" };
        Random rand = new Random();
        GenericRecordBuilder builder = new GenericRecordBuilder(descriptor.getSchema());
        for (int i = 0; i < 100; i++) {
            GenericRecord record = builder.set("username", "user-" + i).set("creationDate", System.currentTimeMillis()).set("favoriteColor", colors[rand.nextInt(colors.length)]).build();
            writer.write(record);
        }
    } finally {
        writer.close();
    }
    return 0;
}

Example 18 with DatasetRepository

use of com.cloudera.cdk.data.DatasetRepository in project cdk-examples by cloudera.

the class CreateUserDatasetGenericParquet method run.

@Override
public int run(String[] args) throws Exception {
    // Construct a filesystem dataset repository rooted at /tmp/data
    DatasetRepository repo = DatasetRepositories.open("repo:hdfs:/tmp/data");
    // Create a dataset of users with the Avro schema, and Parquet format in the
    // repository
    DatasetDescriptor descriptor = new DatasetDescriptor.Builder().schemaUri("resource:user.avsc").format(Formats.PARQUET).build();
    Dataset<GenericRecord> users = repo.create("users", descriptor);
    // Get a writer for the dataset and write some users to it
    DatasetWriter<GenericRecord> writer = users.newWriter();
    try {
        writer.open();
        String[] colors = { "green", "blue", "pink", "brown", "yellow" };
        Random rand = new Random();
        GenericRecordBuilder builder = new GenericRecordBuilder(descriptor.getSchema());
        for (int i = 0; i < 100; i++) {
            GenericRecord record = builder.set("username", "user-" + i).set("creationDate", System.currentTimeMillis()).set("favoriteColor", colors[rand.nextInt(colors.length)]).build();
            writer.write(record);
        }
    } finally {
        writer.close();
    }
    return 0;
}

Example 19 with DatasetRepository

use of com.cloudera.cdk.data.DatasetRepository in project cdk-examples by cloudera.

the class CreateUserDatasetGenericPartitioned method run.

@Override
public int run(String[] args) throws Exception {
    // Construct a filesystem dataset repository rooted at /tmp/data
    DatasetRepository repo = DatasetRepositories.open("repo:hdfs:/tmp/data");
    // Create a partition strategy that hash partitions on username with 10 buckets
    PartitionStrategy partitionStrategy = new PartitionStrategy.Builder().hash("username", 10).build();
    // Create a dataset of users with the Avro schema in the repository
    DatasetDescriptor descriptor = new DatasetDescriptor.Builder().schemaUri("resource:user.avsc").partitionStrategy(partitionStrategy).build();
    Dataset<GenericRecord> users = repo.create("users", descriptor);
    // Get a writer for the dataset and write some users to it
    DatasetWriter<GenericRecord> writer = users.newWriter();
    try {
        writer.open();
        String[] colors = { "green", "blue", "pink", "brown", "yellow" };
        Random rand = new Random();
        GenericRecordBuilder builder = new GenericRecordBuilder(descriptor.getSchema());
        for (int i = 0; i < 100; i++) {
            GenericRecord record = builder.set("username", "user-" + i).set("creationDate", System.currentTimeMillis()).set("favoriteColor", colors[rand.nextInt(colors.length)]).build();
            writer.write(record);
        }
    } finally {
        writer.close();
    }
    return 0;
}

Example 20 with DatasetRepository

use of com.cloudera.cdk.data.DatasetRepository in project cdk-examples by cloudera.

the class ReadProductDatasetPojo method run.

@Override
public int run(String[] args) throws Exception {
    // Construct a filesystem dataset repository rooted at /tmp/data
    DatasetRepository repo = DatasetRepositories.open("repo:hdfs:/tmp/data");
    // Load the products dataset
    Dataset<Product> products = repo.load("products");
    // Get a reader for the dataset and read all the products
    DatasetReader<Product> reader = products.newReader();
    try {
        reader.open();
        for (Product product : reader) {
            System.out.println(product);
        }
    } finally {
        reader.close();
    }
    return 0;
}