/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.example;
import com.facebook.presto.spi.ColumnMetadata;
import com.facebook.presto.spi.ColumnType;
import com.facebook.presto.spi.ConnectorTableMetadata;
import com.facebook.presto.spi.SchemaTableName;
import com.facebook.presto.spi.TableNotFoundException;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.io.Resources;
import io.airlift.json.JsonCodec;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.net.URI;
import java.net.URL;
import java.util.List;
import java.util.Map;
import static com.facebook.presto.spi.ColumnType.LONG;
import static com.facebook.presto.spi.ColumnType.STRING;
import static io.airlift.json.JsonCodec.listJsonCodec;
import static io.airlift.json.JsonCodec.mapJsonCodec;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertNotNull;
import static org.testng.Assert.assertNull;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;
public class TestExampleMetadata
{
private static final JsonCodec<Map<String, List<ExampleTable>>> CATALOG_CODEC = mapJsonCodec(String.class, listJsonCodec(ExampleTable.class));
private static final String CONNECTOR_ID = "TEST";
private static final ExampleTableHandle NUMBERS_TABLE_HANDLE = new ExampleTableHandle(CONNECTOR_ID, "example", "numbers");
private ExampleMetadata metadata;
private URI metadataUri;
@BeforeMethod
public void setUp()
throws Exception
{
URL metadataUrl = Resources.getResource(TestExampleClient.class, "/example-data/example-metadata.json");
assertNotNull(metadataUrl, "metadataUrl is null");
metadataUri = metadataUrl.toURI();
ExampleClient client = new ExampleClient(new ExampleConfig().setMetadata(metadataUri), CATALOG_CODEC);
metadata = new ExampleMetadata(new ExampleConnectorId(CONNECTOR_ID), client);
}
@Test
public void testCanHandle()
{
assertTrue(metadata.canHandle(new ExampleTableHandle(CONNECTOR_ID, "schema", "table")));
assertFalse(metadata.canHandle(new ExampleTableHandle("unknown", "schema", "table")));
}
@Test
public void testListSchemaNames()
{
assertEquals(metadata.listSchemaNames(), ImmutableSet.of("example", "tpch"));
}
@Test
public void testGetTableHandle()
{
assertEquals(metadata.getTableHandle(new SchemaTableName("example", "numbers")), NUMBERS_TABLE_HANDLE);
assertNull(metadata.getTableHandle(new SchemaTableName("example", "unknown")));
assertNull(metadata.getTableHandle(new SchemaTableName("unknown", "numbers")));
assertNull(metadata.getTableHandle(new SchemaTableName("unknown", "unknown")));
}
@Test
public void testGetColumnHandle()
{
// known column
assertEquals(metadata.getColumnHandle(NUMBERS_TABLE_HANDLE, "text"),
new ExampleColumnHandle(CONNECTOR_ID, "text", STRING, 0));
// unknown column
assertNull(metadata.getColumnHandle(NUMBERS_TABLE_HANDLE, "unknown"));
// unknown table
try {
metadata.getColumnHandle(new ExampleTableHandle(CONNECTOR_ID, "unknown", "unknown"), "unknown");
fail("Expected getColumnHandle of unknown table to throw a TableNotFoundException");
}
catch (TableNotFoundException expected) {
}
try {
metadata.getColumnHandle(new ExampleTableHandle(CONNECTOR_ID, "example", "unknown"), "unknown");
fail("Expected getColumnHandle of unknown table to throw a TableNotFoundException");
}
catch (TableNotFoundException expected) {
}
}
@Test
public void testGetColumnHandles()
{
// known table
assertEquals(metadata.getColumnHandles(NUMBERS_TABLE_HANDLE), ImmutableMap.of(
"text", new ExampleColumnHandle(CONNECTOR_ID, "text", STRING, 0),
"value", new ExampleColumnHandle(CONNECTOR_ID, "value", LONG, 1)));
// unknown table
try {
metadata.getColumnHandles(new ExampleTableHandle(CONNECTOR_ID, "unknown", "unknown"));
fail("Expected getColumnHandle of unknown table to throw a TableNotFoundException");
}
catch (TableNotFoundException expected) {
}
try {
metadata.getColumnHandles(new ExampleTableHandle(CONNECTOR_ID, "example", "unknown"));
fail("Expected getColumnHandle of unknown table to throw a TableNotFoundException");
}
catch (TableNotFoundException expected) {
}
}
@Test
public void getTableMetadata()
{
// known table
ConnectorTableMetadata tableMetadata = metadata.getTableMetadata(NUMBERS_TABLE_HANDLE);
assertEquals(tableMetadata.getTable(), new SchemaTableName("example", "numbers"));
assertEquals(tableMetadata.getColumns(), ImmutableList.of(
new ColumnMetadata("text", STRING, 0, false),
new ColumnMetadata("value", ColumnType.LONG, 1, false)));
// unknown tables should produce null
assertNull(metadata.getTableMetadata(new ExampleTableHandle(CONNECTOR_ID, "unknown", "unknown")));
assertNull(metadata.getTableMetadata(new ExampleTableHandle(CONNECTOR_ID, "example", "unknown")));
assertNull(metadata.getTableMetadata(new ExampleTableHandle(CONNECTOR_ID, "unknown", "numbers")));
}
@Test
public void testListTables()
{
// all schemas
assertEquals(ImmutableSet.copyOf(metadata.listTables(null)), ImmutableSet.of(
new SchemaTableName("example", "numbers"),
new SchemaTableName("tpch", "orders"),
new SchemaTableName("tpch", "lineitem")));
// specific schema
assertEquals(ImmutableSet.copyOf(metadata.listTables("example")), ImmutableSet.of(
new SchemaTableName("example", "numbers")));
assertEquals(ImmutableSet.copyOf(metadata.listTables("tpch")), ImmutableSet.of(
new SchemaTableName("tpch", "orders"),
new SchemaTableName("tpch", "lineitem")));
// unknown schema
assertEquals(ImmutableSet.copyOf(metadata.listTables("unknown")), ImmutableSet.of());
}
@Test
public void getColumnMetadata()
{
assertEquals(metadata.getColumnMetadata(NUMBERS_TABLE_HANDLE, new ExampleColumnHandle(CONNECTOR_ID, "text", STRING, 0)),
new ColumnMetadata("text", STRING, 0, false));
// example connector assumes that the table handle and column handle are
// properly formed, so it will return a metadata object for any
// ExampleTableHandle and ExampleColumnHandle passed in. This is on because
// it is not possible for the Presto Metadata system to create the handles
// directly.
}
@Test(expectedExceptions = UnsupportedOperationException.class)
public void testCreateTable()
{
metadata.createTable(new ConnectorTableMetadata(
new SchemaTableName("example", "foo"),
ImmutableList.of(new ColumnMetadata("text", STRING, 0, false))));
}
@Test(expectedExceptions = UnsupportedOperationException.class)
public void testDropTableTable()
{
metadata.dropTable(NUMBERS_TABLE_HANDLE);
}
}