Examples with SchemaFieldQuery com.hortonworks.registries.schemaregistry.SchemaFieldQuery used on opensource projects

Example 1 with SchemaFieldQuery

use of com.hortonworks.registries.schemaregistry.SchemaFieldQuery in project registry by hortonworks.

the class SampleSchemaRegistryClientApp method runSchemaApis.

public void runSchemaApis() throws Exception {
    String schemaFileName = "/device.avsc";
    String schema1 = getSchema(schemaFileName);
    SchemaMetadata schemaMetadata = createSchemaMetadata("com.hwx.schemas.sample-" + System.currentTimeMillis());
    // registering a new schema
    SchemaIdVersion v1 = schemaRegistryClient.addSchemaVersion(schemaMetadata, new SchemaVersion(schema1, "Initial version of the schema"));
    LOG.info("Registered schema [{}] and returned version [{}]", schema1, v1);
    // adding a new version of the schema
    String schema2 = getSchema("/device-next.avsc");
    SchemaVersion schemaInfo2 = new SchemaVersion(schema2, "second version");
    SchemaIdVersion v2 = schemaRegistryClient.addSchemaVersion(schemaMetadata, schemaInfo2);
    LOG.info("Registered schema [{}] and returned version [{}]", schema2, v2);
    // adding same schema returns the earlier registered version
    SchemaIdVersion version = schemaRegistryClient.addSchemaVersion(schemaMetadata, schemaInfo2);
    LOG.info("Received version [{}] for schema metadata [{}]", version, schemaMetadata);
    // get a specific version of the schema
    String schemaName = schemaMetadata.getName();
    SchemaVersionInfo schemaVersionInfo = schemaRegistryClient.getSchemaVersionInfo(new SchemaVersionKey(schemaName, v2.getVersion()));
    LOG.info("Received schema version info [{}] for schema metadata [{}]", schemaVersionInfo, schemaMetadata);
    // get latest version of the schema
    SchemaVersionInfo latest = schemaRegistryClient.getLatestSchemaVersionInfo(schemaName);
    LOG.info("Latest schema with schema key [{}] is : [{}]", schemaMetadata, latest);
    // get all versions of the schema
    Collection<SchemaVersionInfo> allVersions = schemaRegistryClient.getAllVersions(schemaName);
    LOG.info("All versions of schema key [{}] is : [{}]", schemaMetadata, allVersions);
    // finding schemas containing a specific field
    SchemaFieldQuery md5FieldQuery = new SchemaFieldQuery.Builder().name("md5").build();
    Collection<SchemaVersionKey> md5SchemaVersionKeys = schemaRegistryClient.findSchemasByFields(md5FieldQuery);
    LOG.info("Schemas containing field query [{}] : [{}]", md5FieldQuery, md5SchemaVersionKeys);
    SchemaFieldQuery txidFieldQuery = new SchemaFieldQuery.Builder().name("txid").build();
    Collection<SchemaVersionKey> txidSchemaVersionKeys = schemaRegistryClient.findSchemasByFields(txidFieldQuery);
    LOG.info("Schemas containing field query [{}] : [{}]", txidFieldQuery, txidSchemaVersionKeys);
}