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path: root/js/src/Ice/LocatorManager.js
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// **********************************************************************
//
// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************

(function(global){
    require("Ice/Class");
    require("Ice/HashMap");
    require("Ice/LocatorInfo");
    require("Ice/LocatorTable");
    require("Ice/Locator");
    
    var Ice = global.Ice || {};
    
    var HashMap = Ice.HashMap;
    var LocatorInfo = Ice.LocatorInfo;
    var LocatorTable = Ice.LocatorTable;
    var LocatorPrx = Ice.LocatorPrx;

    var LocatorManager = Ice.Class({
        __init__: function(properties)
        {
            this._background = properties.getPropertyAsInt("Ice.BackgroundLocatorCacheUpdates") > 0;

            this._table = new HashMap(); // Map<Ice.LocatorPrx, LocatorInfo>
            this._table.keyComparator = HashMap.compareEquals;
            this._locatorTables = new HashMap(); // Map<Ice.Identity, LocatorTable>
            this._locatorTables.keyComparator = HashMap.compareEquals;
        },
        destroy: function()
        {
            for(var e = this._table.entries; e !== null; e = e.next)
            {
                e.value.destroy();
            }
            this._table.clear();
            this._locatorTables.clear();
        },
        //
        // Returns locator info for a given locator. Automatically creates
        // the locator info if it doesn't exist yet.
        //
        find: function(loc)
        {
            if(loc === null)
            {
                return null;
            }

            //
            // The locator can't be located.
            //
            var locator = LocatorPrx.uncheckedCast(loc.ice_locator(null));

            //
            // TODO: reap unused locator info objects?
            //

            var info = this._table.get(locator);
            if(info === undefined)
            {
                //
                // Rely on locator identity for the adapter table. We want to
                // have only one table per locator (not one per locator
                // proxy).
                //
                var table = this._locatorTables.get(locator.ice_getIdentity());
                if(table === undefined)
                {
                    table = new LocatorTable();
                    this._locatorTables.set(locator.ice_getIdentity(), table);
                }

                info = new LocatorInfo(locator, table, this._background);
                this._table.set(locator, info);
            }

            return info;
        }
    });
    
    Ice.LocatorManager = LocatorManager;
    global.Ice = Ice;
}(typeof (global) === "undefined" ? window : global));