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From lewismc <...@git.apache.org>
Subject [GitHub] gora pull request #111: [WIP] GORA-502 Implement Aerospike Data Store
Date Tue, 20 Jun 2017 14:55:55 GMT
Github user lewismc commented on a diff in the pull request:

    https://github.com/apache/gora/pull/111#discussion_r122998074
  
    --- Diff: gora-aerospike/src/main/java/org/apache/gora/aerospike/store/AerospikeStore.java
---
    @@ -0,0 +1,169 @@
    +/**
    + * 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
    + * <p>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p>
    + * 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.gora.aerospike.store;
    +
    +import java.io.IOException;
    +import java.util.List;
    +import java.util.Properties;
    +
    +import com.aerospike.client.*;
    +import com.aerospike.client.policy.ClientPolicy;
    +import org.apache.avro.Schema;
    +import org.apache.avro.Schema.Field;
    +import org.apache.gora.persistency.impl.PersistentBase;
    +import org.apache.gora.query.PartitionQuery;
    +import org.apache.gora.query.Query;
    +import org.apache.gora.query.Result;
    +import org.apache.gora.store.DataStoreFactory;
    +import org.apache.gora.store.impl.DataStoreBase;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +/**
    + * Implementation of a Aerospike data store to be used by gora.
    + *
    + * @param <K> class to be used for the key
    + * @param <T> class to be persisted within the store
    + */
    +public class AerospikeStore<K, T extends PersistentBase> extends DataStoreBase<K,
T> {
    +
    +  public static final Logger LOG = LoggerFactory.getLogger(AerospikeStore.class);
    +
    +  private static final String PARSE_MAPPING_FILE_KEY = "gora.aerospike.mapping.file";
    +
    +  private static final String DEFAULT_MAPPING_FILE = "gora-aerospike-mapping.xml";
    +
    +  private AerospikeClient aerospikeClient;
    +
    +  private AerospikeParameters aerospikeParameters;
    +
    +  @Override public void initialize(Class<K> keyClass, Class<T> persistentClass,
    +          Properties properties) {
    +    super.initialize(keyClass, persistentClass, properties);
    +
    +    try {
    +      AerospikeMappingBuilder aerospikeMappingBuilder = new AerospikeMappingBuilder();
    +      aerospikeMappingBuilder
    +              .readMappingFile(getConf().get(PARSE_MAPPING_FILE_KEY, DEFAULT_MAPPING_FILE),
    +                      keyClass, persistentClass);
    +      aerospikeParameters = new AerospikeParameters(aerospikeMappingBuilder.getAerospikeMapping(),
    +              properties);
    +      ClientPolicy policy = new ClientPolicy();
    +      policy.writePolicyDefault = aerospikeParameters.getAerospikeMapping().getWritePolicy();
    +      policy.readPolicyDefault = aerospikeParameters.getAerospikeMapping().getReadPolicy();
    +      aerospikeClient = new AerospikeClient(aerospikeParameters.getHost(),
    +              aerospikeParameters.getPort());
    +      aerospikeParameters.setServerSpecificParameters(aerospikeClient);
    +    } catch (Exception e) {
    +      throw new RuntimeException(e);
    +    }
    +  }
    +
    +  @Override public String getSchemaName() {
    +    return null;
    +  }
    +
    +  @Override public void createSchema() {
    +  }
    +
    +  @Override public void deleteSchema() {
    +  }
    +
    +  @Override public boolean schemaExists() {
    +    return true;
    +  }
    +
    +  @Override public T get(K key, String[] fields) {
    +    return null;
    +  }
    +
    +  @Override public void put(K key, T persistent) {
    +
    +    Key recordKey = new Key(aerospikeParameters.getAerospikeMapping().getNamespace(),
    +            aerospikeParameters.getAerospikeMapping().getSet(), Value.get(key));
    +
    +    List<Field> fields = persistent.getSchema().getFields();
    +    for (int i = 0; i < fields.size(); i++) {
    +      String mappingBinName = aerospikeParameters.getAerospikeMapping().getBinMapping()
    +              .get(fields.get(i).name());
    +      if (mappingBinName == null) {
    +        throw new RuntimeException(
    +                "Aerospike mapping for field [" + persistent.getClass().getName() + "#"
+ fields
    +                        .get(i).name() + "] not found. Wrong gora-aerospike-mapping.xml?");
    +      }
    +      Bin bin = getBin(mappingBinName, persistent.get(i), fields.get(i));
    +      aerospikeClient
    +              .put(aerospikeParameters.getAerospikeMapping().getWritePolicy(), recordKey,
bin);
    +    }
    +  }
    +
    +  @Override public boolean delete(K key) {
    +    return true;
    +  }
    +
    +  @Override public long deleteByQuery(Query<K, T> query) {
    +    return 0;
    +  }
    +
    +  @Override public Result<K, T> execute(Query<K, T> query) {
    +    return null;
    +  }
    +
    +  @Override public Query<K, T> newQuery() {
    +    return null;
    +  }
    +
    +  @Override public List<PartitionQuery<K, T>> getPartitions(Query<K, T>
query) throws IOException {
    +    return null;
    +  }
    +
    +  public void flush() {
    +  }
    +
    +  @Override public void close() {
    +    aerospikeClient.close();
    +  }
    +
    +  /**
    +   * Aerospike does not support Utf8 format returned from Avro.
    --- End diff --
    
    What is **bin**? Can you elaborate and make it clearer?


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