mongodb/shell/servers.js

_parsePath = function() {
    var dbpath = "";
    for( var i = 0; i < arguments.length; ++i )
        if ( arguments[ i ] == "--dbpath" )
            dbpath = arguments[ i + 1 ];
    
    if ( dbpath == "" )
        throw "No dbpath specified";
    
    return dbpath;
}

_parsePort = function() {
    var port = "";
    for( var i = 0; i < arguments.length; ++i )
        if ( arguments[ i ] == "--port" )
            port = arguments[ i + 1 ];
    
    if ( port == "" )
        throw "No port specified";
    return port;
}

createMongoArgs = function( binaryName , args ){
    var fullArgs = [ binaryName ];

    if ( args.length == 1 && isObject( args[0] ) ){
        var o = args[0];
        for ( var k in o ){
            fullArgs.push( "--" + k );
            fullArgs.push( "" + o[k] );
        }
    }
    else {
        for ( var i=0; i<args.length; i++ )
            fullArgs.push( args[i] )
    }

    return fullArgs;
}

// Start a mongod instance and return a 'Mongo' object connected to it.
// This function's arguments are passed as command line arguments to mongod.
// The specified 'dbpath' is cleared if it exists, created if not.
startMongod = function(){

    var args = createMongoArgs( "mongod" , arguments );
    
    var dbpath = _parsePath.apply( null, args );
    resetDbpath( dbpath );

    return startMongoProgram.apply( null, args );
}

startMongos = function(){
    return startMongoProgram.apply( null, createMongoArgs( "mongos" , arguments ) );
}

// Start a mongo program instance (generally mongod or mongos) and return a
// 'Mongo' object connected to it.  This function's first argument is the
// program name, and subsequent arguments to this function are passed as
// command line arguments to the program.
startMongoProgram = function(){
    var port = _parsePort.apply( null, arguments );

    _startMongoProgram.apply( null, arguments );
    
    var m;
    assert.soon
    ( function() {
        try {
            m = new Mongo( "127.0.0.1:" + port );
            return true;
        } catch( e ) {
        }
        return false;
    } );
    
    return m;
}

ShardingTest = function( testName , numServers ){
    this._connections = [];
    this._serverNames = [];

    for ( var i=0; i<numServers; i++){
        var conn = startMongod( { port : 30000 + i , dbpath : "/data/db/" + testName + i } );
        conn.name = "localhost:" + ( 30000 + i );
        
        this._connections.push( conn );
        this._serverNames.push( conn.name );
    }

    this.s = startMongos( { port : 39999 , configdb : "localhost:30000" } );
    
    var admin = this.admin = this.s.getDB( "admin" );
    this.config = this.s.getDB( "config" );
    
    this._serverNames.forEach( 
        function(z){
            admin.runCommand( { addserver : z } );
        }
    );
}

ShardingTest.prototype.getDB = function( name ){
    return this.s.getDB( name );
}

ShardingTest.prototype.getServerName = function( dbname ){
    return this.config.databases.findOne( { name : dbname } ).primary;
}

ShardingTest.prototype.getServer = function( dbname ){
    var name = this.getServerName( dbname );
    for ( var i=0; i<this._serverNames.length; i++ ){
        if ( name == this._serverNames[i] )
            return this._connections[i];
    }
    throw "can't find server for: " + dbname + " name:" + name;

}

ShardingTest.prototype.getOther = function( one ){
    if ( this._connections.length != 2 )
        throw "getOther only works with 2 servers";
    
    if ( this._connections[0] == one )
        return this._connections[1];
    return this._connections[0];
}

ShardingTest.prototype.stop = function(){
    stopMongoProgram( 39999 );
    for ( var i=0; i<this._connections.length; i++){
        stopMongod( 30000 + i );
    }
}

ShardingTest.prototype.adminCommand = function(cmd){
    var res = this.admin.runCommand( cmd );
    if ( res && res.ok == 1 )
        return true;
    
    throw "command " + tojson( cmd ) + " failed: " + tojson( res );
}