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MongoStoragePlugin.java
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MongoStoragePlugin.java
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/**
* 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.drill.exec.store.mongo;
import java.io.IOException;
import java.util.Set;
import net.hydromatic.optiq.SchemaPlus;
import org.apache.drill.common.JSONOptions;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.exec.physical.base.AbstractGroupScan;
import org.apache.drill.exec.rpc.user.UserSession;
import org.apache.drill.exec.server.DrillbitContext;
import org.apache.drill.exec.store.AbstractStoragePlugin;
import org.apache.drill.exec.store.StoragePluginOptimizerRule;
import org.apache.drill.exec.store.mongo.schema.MongoSchemaFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.collect.ImmutableSet;
public class MongoStoragePlugin extends AbstractStoragePlugin {
static final Logger logger = LoggerFactory
.getLogger(MongoStoragePlugin.class);
private DrillbitContext context;
private MongoStoragePluginConfig mongoConfig;
private MongoSchemaFactory schemaFactory;
public MongoStoragePlugin(MongoStoragePluginConfig mongoConfig,
DrillbitContext context, String name) throws IOException,
ExecutionSetupException {
this.context = context;
this.mongoConfig = mongoConfig;
this.schemaFactory = new MongoSchemaFactory(this, name);
}
public DrillbitContext getContext() {
return this.context;
}
@Override
public MongoStoragePluginConfig getConfig() {
return mongoConfig;
}
@Override
public void registerSchemas(UserSession session, SchemaPlus parent) throws IOException {
schemaFactory.registerSchemas(session, parent);
}
@Override
public boolean supportsRead() {
return true;
}
@Override
public AbstractGroupScan getPhysicalScan(JSONOptions selection)
throws IOException {
MongoScanSpec mongoScanSpec = selection.getListWith(new ObjectMapper(),
new TypeReference<MongoScanSpec>() {
});
return new MongoGroupScan(this, mongoScanSpec, null);
}
public Set<StoragePluginOptimizerRule> getOptimizerRules() {
return ImmutableSet.of(MongoPushDownFilterForScan.INSTANCE);
}
}