.hive命令的3种调用方式 以及源码

/**
* 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.hadoop.hive.cli;import java.util.HashMap;
import java.util.Arrays;
import java.util.Map;
import java.util.Properties;import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.hadoop.hive.common.cli.CommonCliOptions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;/**
* OptionsProcessor.
*
*/
public class OptionsProcessor {
protected static final Logger l4j = LoggerFactory.getLogger(OptionsProcessor.class.getName());
private final Options options = new Options();
private org.apache.commons.cli.CommandLine commandLine;
Map<String, String> hiveVariables = new HashMap<String, String>(); @SuppressWarnings("static-access")
public OptionsProcessor() { // -database database
options.addOption(OptionBuilder
.hasArg()
.withArgName("databasename")
.withLongOpt("database")
.withDescription("Specify the database to use")
.create()); // -e 'quoted-query-string'
options.addOption(OptionBuilder
.hasArg()
.withArgName("quoted-query-string")
.withDescription("SQL from command line")
.create('e')); // -f <query-file>
options.addOption(OptionBuilder
.hasArg()
.withArgName("filename")
.withDescription("SQL from files")
.create('f')); // -i <init-query-file>
options.addOption(OptionBuilder
.hasArg()
.withArgName("filename")
.withDescription("Initialization SQL file")
.create('i')); // -hiveconf x=y
options.addOption(OptionBuilder
.withValueSeparator()
.hasArgs(2)
.withArgName("property=value")
.withLongOpt("hiveconf")
.withDescription("Use value for given property")
.create()); // Substitution option -d, --define
options.addOption(OptionBuilder
.withValueSeparator()
.hasArgs(2)
.withArgName("key=value")
.withLongOpt("define")
.withDescription("Variable substitution to apply to Hive commands. e.g. -d A=B or --define A=B")
.create('d')); // Substitution option --hivevar
options.addOption(OptionBuilder
.withValueSeparator()
.hasArgs(2)
.withArgName("key=value")
.withLongOpt("hivevar")
.withDescription("Variable substitution to apply to Hive commands. e.g. --hivevar A=B")
.create()); // [-S|--silent]
options.addOption(new Option("S", "silent", false, "Silent mode in interactive shell")); // [-v|--verbose]
options.addOption(new Option("v", "verbose", false, "Verbose mode (echo executed SQL to the console)")); // [-H|--help]
options.addOption(new Option("H", "help", false, "Print help information")); } public boolean process_stage1(String[] argv) {
try {
commandLine = new GnuParser().parse(options, argv);
Properties confProps = commandLine.getOptionProperties("hiveconf");
for (String propKey : confProps.stringPropertyNames()) {
// with HIVE-11304, hive.root.logger cannot have both logger name and log level.
// if we still see it, split logger and level separately for hive.root.logger
// and hive.log.level respectively
if (propKey.equalsIgnoreCase("hive.root.logger")) {
CommonCliOptions.splitAndSetLogger(propKey, confProps);
} else {
System.setProperty(propKey, confProps.getProperty(propKey));
}
} Properties hiveVars = commandLine.getOptionProperties("define");
for (String propKey : hiveVars.stringPropertyNames()) {
hiveVariables.put(propKey, hiveVars.getProperty(propKey));
} Properties hiveVars2 = commandLine.getOptionProperties("hivevar");
for (String propKey : hiveVars2.stringPropertyNames()) {
hiveVariables.put(propKey, hiveVars2.getProperty(propKey));
}
} catch (ParseException e) {
System.err.println(e.getMessage());
printUsage();
return false;
}
return true;
} public boolean process_stage2(CliSessionState ss) {
ss.getConf(); if (commandLine.hasOption('H')) {
printUsage();
return false;
} ss.setIsSilent(commandLine.hasOption('S')); ss.database = commandLine.getOptionValue("database"); ss.execString = commandLine.getOptionValue('e'); ss.fileName = commandLine.getOptionValue('f'); ss.setIsVerbose(commandLine.hasOption('v')); String[] initFiles = commandLine.getOptionValues('i');
if (null != initFiles) {
ss.initFiles = Arrays.asList(initFiles);
} if (ss.execString != null && ss.fileName != null) {
System.err.println("The '-e' and '-f' options cannot be specified simultaneously");
printUsage();
return false;
} if (commandLine.hasOption("hiveconf")) {
Properties confProps = commandLine.getOptionProperties("hiveconf");
for (String propKey : confProps.stringPropertyNames()) {
ss.cmdProperties.setProperty(propKey, confProps.getProperty(propKey));
}
} return true;
} private void printUsage() {
new HelpFormatter().printHelp("hive", options);
} public Map<String, String> getHiveVariables() {
return hiveVariables;
}
}

public static OptionBuilder hasArg()
{
OptionBuilder.numberOfArgs = 1; return INSTANCE;
}

public static Option create(String opt) throws IllegalArgumentException
{
Option option = null;
try
{
// create the option
option = new Option(opt, description); // set the option properties
option.setLongOpt(longopt);
option.setRequired(required);
option.setOptionalArg(optionalArg);
option.setArgs(numberOfArgs);
option.setType(type);
option.setValueSeparator(valuesep);
option.setArgName(argName);
}
finally
{
// reset the OptionBuilder properties
OptionBuilder.reset();
} // return the Option instance
return option;
}

*/
public class Option implements Cloneable, Serializable
{
/** constant that specifies the number of argument values has not been specified */
public static final int UNINITIALIZED = -1; /** constant that specifies the number of argument values is infinite */
public static final int UNLIMITED_VALUES = -2; /** The serial version UID. */
private static final long serialVersionUID = 1L; /** the name of the option */
private final String opt; /** the long representation of the option */
private String longOpt; /** the name of the argument for this option */
private String argName; /** description of the option */
private String description; /** specifies whether this option is required to be present */
private boolean required; /** specifies whether the argument value of this Option is optional */
private boolean optionalArg; /** the number of argument values this option can have */
private int numberOfArgs = UNINITIALIZED; /** the type of this Option */
private Class<?> type = String.class; /** the list of argument values **/
private List<String> values = new ArrayList<String>(); /** the character that is the value separator */
private char valuesep; /**
* Private constructor used by the nested Builder class.
*
* @param builder builder used to create this option
*/
private Option(final Builder builder)
{
this.argName = builder.argName;
this.description = builder.description;
this.longOpt = builder.longOpt;
this.numberOfArgs = builder.numberOfArgs;
this.opt = builder.opt;
this.optionalArg = builder.optionalArg;
this.required = builder.required;
this.type = builder.type;
this.valuesep = builder.valuesep;
}