alluxio.cli.table.command

Class ListDatabasesCommand

java.lang.Object

alluxio.cli.fs.command.AbstractFileSystemCommand

alluxio.cli.fs.command.AbstractDistributedJobCommand

alluxio.cli.table.command.AbstractTableCommand

alluxio.cli.table.command.ListDatabasesCommand

All Implemented Interfaces:

Command, java.io.Closeable, java.lang.AutoCloseable

public class ListDatabasesCommand
extends AbstractTableCommand

List information about attached databases and tables in the Alluxio catalog. This command has similar function to what a SHOW TABLES or SHOW DATABASES query would return but makes it easier to query on a local machine what the Alluxio catalog currently stores without needing to boot up a presto instance.

Field Summary

Fields inherited from class alluxio.cli.table.command.AbstractTableCommand

mClient, mConf

Fields inherited from class alluxio.cli.fs.command.AbstractDistributedJobCommand

ASYNC_OPTION, DEFAULT_ACTIVE_JOBS, mActiveJobs, mSubmittedJobAttempts

Fields inherited from class alluxio.cli.fs.command.AbstractFileSystemCommand

mFileSystem, mFsContext

Constructor Summary

Constructors

Constructor and Description
ListDatabasesCommand(AlluxioConfiguration conf, TableMasterClient client, FileSystemContext fsContext) Creates a new instance of ListDatabasesCommand.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getCommandName()
java.lang.String	getDescription()
java.lang.String	getUsage()
int	listDatabases() Print attached databases to stdout.
int	listTable(java.lang.String db, java.lang.String tableName) Print table information to stdout.
int	listTables(java.lang.String db) Print list of tables stdout.
int	run(org.apache.commons.cli.CommandLine cl)
void	validateArgs(org.apache.commons.cli.CommandLine cl)

Methods inherited from class alluxio.cli.fs.command.AbstractDistributedJobCommand

drain, getCompletedCmdCount, getCompletedCount, getFailedCmdCount, getFailedCount, getFailedFiles, postProcessing, processFailures, submit, waitForCmd, waitJob

Methods inherited from class alluxio.cli.fs.command.AbstractFileSystemCommand

processHeader, runPlainPath, runWildCardCmd

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface alluxio.cli.Command

close, getOptions, getSubCommands, hasSubCommand, parseAndValidateArgs

Constructor Detail

ListDatabasesCommand

public ListDatabasesCommand(AlluxioConfiguration conf,
                            TableMasterClient client,
                            FileSystemContext fsContext)

Creates a new instance of ListDatabasesCommand.

Parameters:

conf - alluxio configuration

client - the table master client

fsContext - the filesystem of Alluxio

Method Detail

getCommandName

public java.lang.String getCommandName()

Specified by:

getCommandName in interface Command

Specified by:

getCommandName in class AbstractTableCommand

getDescription

public java.lang.String getDescription()

getUsage

public java.lang.String getUsage()

validateArgs

public void validateArgs(org.apache.commons.cli.CommandLine cl)
                  throws InvalidArgumentException

Specified by:

validateArgs in interface Command

Specified by:

validateArgs in class AbstractTableCommand

Throws:

InvalidArgumentException

run

public int run(org.apache.commons.cli.CommandLine cl)
        throws AlluxioException,
               java.io.IOException

Specified by:

run in interface Command

Specified by:

run in class AbstractTableCommand

Throws:

AlluxioException

java.io.IOException

listDatabases

public int listDatabases()
                  throws AlluxioStatusException,
                         java.io.IOException

Print attached databases to stdout.

Returns:

0 on success, any non-zero value otherwise

Throws:

AlluxioStatusException

java.io.IOException

listTables

public int listTables(java.lang.String db)
               throws AlluxioStatusException

Print list of tables stdout.

Parameters:

db - the database to list the tables of

Returns:

0 on success, any non-zero value otherwise

Throws:

AlluxioStatusException

listTable

public int listTable(java.lang.String db,
                     java.lang.String tableName)
              throws AlluxioStatusException

Print table information to stdout.

Parameters:

db - the database the table exists in

tableName - the name of the table to dump information for

Returns:

0 on success, any non-zero value otherwise

Throws:

AlluxioStatusException