/*
* 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.ConnectorTableMetadata;
import com.facebook.presto.spi.PrestoException;
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 org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import java.net.URI;
import java.net.URL;
import static com.facebook.presto.example.MetadataUtil.CATALOG_CODEC;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.VarcharType.createUnboundedVarcharType;
import static com.facebook.presto.testing.TestingConnectorSession.SESSION;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertNotNull;
import static org.testng.Assert.assertNull;
import static org.testng.Assert.fail;
@Test(singleThreaded = true)
public class TestExampleMetadata
{
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 testListSchemaNames()
{
assertEquals(metadata.listSchemaNames(SESSION), ImmutableSet.of("example", "tpch"));
}
@Test
public void testGetTableHandle()
{
assertEquals(metadata.getTableHandle(SESSION, new SchemaTableName("example", "numbers")), NUMBERS_TABLE_HANDLE);
assertNull(metadata.getTableHandle(SESSION, new SchemaTableName("example", "unknown")));
assertNull(metadata.getTableHandle(SESSION, new SchemaTableName("unknown", "numbers")));
assertNull(metadata.getTableHandle(SESSION, new SchemaTableName("unknown", "unknown")));
}
@Test
public void testGetColumnHandles()
{
// known table
assertEquals(metadata.getColumnHandles(SESSION, NUMBERS_TABLE_HANDLE), ImmutableMap.of(
"text", new ExampleColumnHandle(CONNECTOR_ID, "text", createUnboundedVarcharType(), 0),
"value", new ExampleColumnHandle(CONNECTOR_ID, "value", BIGINT, 1)));
// unknown table
try {
metadata.getColumnHandles(SESSION, new ExampleTableHandle(CONNECTOR_ID, "unknown", "unknown"));
fail("Expected getColumnHandle of unknown table to throw a TableNotFoundException");
}
catch (TableNotFoundException expected) {
}
try {
metadata.getColumnHandles(SESSION, 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(SESSION, NUMBERS_TABLE_HANDLE);
assertEquals(tableMetadata.getTable(), new SchemaTableName("example", "numbers"));
assertEquals(tableMetadata.getColumns(), ImmutableList.of(
new ColumnMetadata("text", createUnboundedVarcharType()),
new ColumnMetadata("value", BIGINT)));
// unknown tables should produce null
assertNull(metadata.getTableMetadata(SESSION, new ExampleTableHandle(CONNECTOR_ID, "unknown", "unknown")));
assertNull(metadata.getTableMetadata(SESSION, new ExampleTableHandle(CONNECTOR_ID, "example", "unknown")));
assertNull(metadata.getTableMetadata(SESSION, new ExampleTableHandle(CONNECTOR_ID, "unknown", "numbers")));
}
@Test
public void testListTables()
{
// all schemas
assertEquals(ImmutableSet.copyOf(metadata.listTables(SESSION, null)), ImmutableSet.of(
new SchemaTableName("example", "numbers"),
new SchemaTableName("tpch", "orders"),
new SchemaTableName("tpch", "lineitem")));
// specific schema
assertEquals(ImmutableSet.copyOf(metadata.listTables(SESSION, "example")), ImmutableSet.of(
new SchemaTableName("example", "numbers")));
assertEquals(ImmutableSet.copyOf(metadata.listTables(SESSION, "tpch")), ImmutableSet.of(
new SchemaTableName("tpch", "orders"),
new SchemaTableName("tpch", "lineitem")));
// unknown schema
assertEquals(ImmutableSet.copyOf(metadata.listTables(SESSION, "unknown")), ImmutableSet.of());
}
@Test
public void getColumnMetadata()
{
assertEquals(metadata.getColumnMetadata(SESSION, NUMBERS_TABLE_HANDLE, new ExampleColumnHandle(CONNECTOR_ID, "text", createUnboundedVarcharType(), 0)),
new ColumnMetadata("text", createUnboundedVarcharType()));
// 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 = PrestoException.class)
public void testCreateTable()
{
metadata.createTable(SESSION, new ConnectorTableMetadata(
new SchemaTableName("example", "foo"),
ImmutableList.of(new ColumnMetadata("text", createUnboundedVarcharType()))));
}
@Test(expectedExceptions = PrestoException.class)
public void testDropTableTable()
{
metadata.dropTable(SESSION, NUMBERS_TABLE_HANDLE);
}
}