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From GitBox <...@apache.org>
Subject [GitHub] srkukarni commented on a change in pull request #2265: Initial implementation of Pulsar SQL
Date Wed, 01 Aug 2018 00:49:50 GMT
srkukarni commented on a change in pull request #2265: Initial implementation of Pulsar SQL
URL: https://github.com/apache/incubator-pulsar/pull/2265#discussion_r206726273
 
 

 ##########
 File path: pulsar-sql/presto-pulsar/src/main/java/org/apache/pulsar/sql/presto/PulsarMetadata.java
 ##########
 @@ -0,0 +1,383 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.pulsar.sql.presto;
+
+import com.facebook.presto.spi.ColumnHandle;
+import com.facebook.presto.spi.ColumnMetadata;
+import com.facebook.presto.spi.ConnectorSession;
+import com.facebook.presto.spi.ConnectorTableHandle;
+import com.facebook.presto.spi.ConnectorTableLayout;
+import com.facebook.presto.spi.ConnectorTableLayoutHandle;
+import com.facebook.presto.spi.ConnectorTableLayoutResult;
+import com.facebook.presto.spi.ConnectorTableMetadata;
+import com.facebook.presto.spi.Constraint;
+import com.facebook.presto.spi.PrestoException;
+import com.facebook.presto.spi.SchemaTableName;
+import com.facebook.presto.spi.SchemaTablePrefix;
+import com.facebook.presto.spi.TableNotFoundException;
+import com.facebook.presto.spi.connector.ConnectorMetadata;
+import com.facebook.presto.spi.type.BigintType;
+import com.facebook.presto.spi.type.BooleanType;
+import com.facebook.presto.spi.type.DoubleType;
+import com.facebook.presto.spi.type.IntegerType;
+import com.facebook.presto.spi.type.RealType;
+import com.facebook.presto.spi.type.Type;
+import com.facebook.presto.spi.type.VarbinaryType;
+import com.facebook.presto.spi.type.VarcharType;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import io.airlift.log.Logger;
+import org.apache.avro.LogicalType;
+import org.apache.avro.LogicalTypes;
+import org.apache.avro.Schema;
+import org.apache.avro.SchemaParseException;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.pulsar.client.admin.PulsarAdmin;
+import org.apache.pulsar.client.admin.PulsarAdminException;
+import org.apache.pulsar.client.api.PulsarClientException;
+import org.apache.pulsar.common.naming.TopicName;
+import org.apache.pulsar.common.schema.SchemaInfo;
+
+import javax.inject.Inject;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+
+import static org.apache.pulsar.sql.presto.PulsarHandleResolver.convertColumnHandle;
+import static org.apache.pulsar.sql.presto.PulsarHandleResolver.convertTableHandle;
+import static com.facebook.presto.spi.StandardErrorCode.NOT_FOUND;
+import static com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED;
+import static com.facebook.presto.spi.type.DateType.DATE;
+import static com.facebook.presto.spi.type.TimeType.TIME;
+import static com.facebook.presto.spi.type.TimestampType.TIMESTAMP;
+import static java.util.Objects.requireNonNull;
+
+public class PulsarMetadata implements ConnectorMetadata {
+
+    private final String connectorId;
+    private final PulsarAdmin pulsarAdmin;
+
+    private static final Logger log = Logger.get(PulsarMetadata.class);
+
+    @Inject
+    public PulsarMetadata(PulsarConnectorId connectorId, PulsarConnectorConfig pulsarConnectorConfig)
{
+        this.connectorId = requireNonNull(connectorId, "connectorId is null").toString();
+        try {
+            this.pulsarAdmin = pulsarConnectorConfig.getPulsarAdmin();
+        } catch (PulsarClientException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public List<String> listSchemaNames(ConnectorSession session) {
+        List<String> prestoSchemas = new LinkedList<>();
+        try {
+            List<String> tenants = pulsarAdmin.tenants().getTenants();
+            for (String tenant : tenants) {
+                prestoSchemas.addAll(pulsarAdmin.namespaces().getNamespaces(tenant));
+            }
+        } catch (PulsarAdminException e) {
+            throw new RuntimeException("Failed to get schemas from pulsar", e);
+        }
+        return prestoSchemas;
+    }
+
+    @Override
+    public ConnectorTableHandle getTableHandle(ConnectorSession session, SchemaTableName
tableName) {
+        return new PulsarTableHandle(
+                this.connectorId,
+                tableName.getSchemaName(),
+                tableName.getTableName(),
+                tableName.getTableName());
+    }
+
+    @Override
+    public List<ConnectorTableLayoutResult> getTableLayouts(ConnectorSession session,
ConnectorTableHandle table,
+                                                            Constraint<ColumnHandle>
constraint,
+                                                            Optional<Set<ColumnHandle>>
desiredColumns) {
+        PulsarTableHandle handle = convertTableHandle(table);
+        ConnectorTableLayout layout = new ConnectorTableLayout(new PulsarTableLayoutHandle(handle));
+        return ImmutableList.of(new ConnectorTableLayoutResult(layout, constraint.getSummary()));
+    }
+
+    @Override
+    public ConnectorTableLayout getTableLayout(ConnectorSession session, ConnectorTableLayoutHandle
handle) {
+        return new ConnectorTableLayout(handle);
+    }
+
+    @Override
+    public ConnectorTableMetadata getTableMetadata(ConnectorSession session, ConnectorTableHandle
table) {
+        return getTableMetadata(convertTableHandle(table).toSchemaTableName(), true);
+    }
+
+    @Override
+    public List<SchemaTableName> listTables(ConnectorSession session, String schemaNameOrNull)
{
 
 Review comment:
   What happens if a schema contains tens of thousands of topics? Will it ever trash wrt mem?

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