com.facebook.hiveio.common.MetastoreDesc.java Source code

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Here is the source code for com.facebook.hiveio.common.MetastoreDesc.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 com.facebook.hiveio.common;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;
import org.apache.thrift.TException;

import com.facebook.hiveio.output.HiveOutputDescription;
import com.google.common.base.CharMatcher;
import com.google.common.base.Objects;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

/**
 * Host/Port describing a metastore server destination
 */
public class MetastoreDesc implements Writable {
    /** Hive Metastore Host. If not set will infer from HiveConf */
    private String host;
    /** Hive Metastore Port */
    private int port = 9083;

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    /**
     * Create a client to the Metastore
     *
     * @param conf Configuration
     * @return Metastore client
     * @throws TException
     */
    public ThriftHiveMetastore.Iface makeClient(Configuration conf) throws TException {
        ThriftHiveMetastore.Iface client;
        if (hasHost()) {
            client = HiveMetastores.create(host, port);
        } else {
            HiveConf hiveConf = HiveUtils.newHiveConf(conf, HiveOutputDescription.class);
            client = HiveMetastores.create(hiveConf);
        }
        return client;
    }

    /**
     * Check if host is set
     *
     * @return true if host is set
     */
    public boolean hasHost() {
        return host != null && !CharMatcher.WHITESPACE.matchesAllOf(host);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof MetastoreDesc) {
            MetastoreDesc other = (MetastoreDesc) obj;
            return Objects.equal(host, other.host) && port == other.port;
        }
        return false;
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(host, port);
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(this).add("host", host).add("port", port).toString();
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        host = WritableUtils.readString(in);
        port = in.readInt();
    }

    @Override
    public void write(DataOutput out) throws IOException {
        WritableUtils.writeString(out, host);
        out.writeInt(port);
    }
}