/** * This class is used to send requests to the server using {@link Ext.direct.Manager Ext Direct}. * When a request is made, the transport mechanism is handed off to the appropriate * {@link Ext.direct.RemotingProvider Provider} to complete the call. * * # Specifying the functions * * This proxy expects Direct remoting method to be passed in order to be able to complete requests, * one Direct function per CRUD method. This is done via {@link #api} configuration: * * api: { * read: 'MyApp.readRecords', * create: 'MyApp.createRecords', * update: 'MyApp.updateRecords', * destroy: 'MyApp.destroyRecords' * } * * You can also use a `prefix` config to avoid duplicating full namespaces for Direct functions: * * api: { * prefix: 'MyApp', * read: 'readRecords', * create: 'createRecords', * update: 'updateRecords', * destroy: 'destroyRecords' * } * * The preferred way is to specify function names to allow late resolution, however you can * pass function references instead if desired: * * api: { * read: MyApp.readRecords, * create: MyApp.createRecords, * update: MyApp.updateRecords, * destroy: MyApp.destroyRecords * } * * This method of configuring API is not recommended because this way the Direct functions * need to be created very early in the application lifecycle, long before {@link Ext.app.Application} * instance is initialized. * * You can also use the {@link #directFn} configuration instead of {@link #api}. This will use * the same Direct function for all types of requests. * * # Server API * * The server side methods are expected to conform to the following calling conventions: * * ## `read` * * Accept one argument which is either named arguments in an object (default), or an array * of values depending on the {@link #paramsAsHash} configuration. Return an array of records * or an object with format recognizable by the configured {@link Ext.data.reader.Reader} * instance. * * Example {@link Ext.direct.RemotingProvider#cfg-actions Direct API declaration}: * * actions: { * MyApp: [{ * name: 'readRecords', * params: [], * strict: false * }] * } * * Example function invocation: * * MyApp.readRecords( * { * start: 0, * limit: 10 * }, * // Results are passed to the callback function * function(records) { * console.log(records); * // Logs: [{ id: 'r0', text: 'foo' }, { id: 'r1', text: 'bar' }] * } * ); * * ## `create` * * Accept one ordered argument which is either an object with data for the new record, * or an array of objects for multiple records. Return an array of identifiers for actually * created records. See {@link Ext.data.Model#clientIdProperty} for more information. * * Example {@link Ext.direct.RemotingProvider#cfg-actions Direct API declaration}: * * actions: [ * MyApp: [{ * name: 'createRecords', * len: 1 * }] * } * * Example function invocation: * * MyApp.createRecords( * [ * { id: 0, text: 'foo' }, * { id: 1, text: 'bar' } * ], * // Results are passed to the callback function * function(records) { * console.log(records); * // Logs: [{ clientId: 0, id: 'r0' }, { clientId: 1, id: 'r1' }] * } * ); * * ## `update` * * Accept one ordered argument which is either an object with updated data and valid * record identifier, or an array of objects for multiple records. Return an array of * objects with updated record data. * * Example {@link Ext.direct.RemotingProvider#cfg-actions Direct API declaration}: * * actions: [ * MyApp: [{ * name: 'updateRecords', * len: 1 * }] * } * * Example function invocation: * * MyApp.updateRecords( * [ * { id: 'r0', text: 'blerg' }, * { id: 'r1', text: 'throbbe' } * ], * // Results are passed to the callback function * function(records) { * console.log(records); * // Logs: [{ id: 'r0', text: 'blerg' }, { id: 'r1', text: 'throbbe }] * } * ); * * ## `destroy` * * Accept one ordered argument which is an array of record identifiers to be deleted. * Return an object with at least one {@link Ext.data.reader.Json#successProperty} * property set to `true` or `false`, with more optional properties recognizable by configured * {@link Ext.data.reader.Reader} instance. * * Example {@link Ext.direct.RemotingProvider#cfg-actions Direct API declaration}: * * actions: [ * MyApp: [{ * name: 'destroyRecords', * len: 1 * }] * } * * Example function invocation: * * MyApp.destroyRecords( * [ * { id: 'r0' }, * { id: 'r1' } * ], * // Results are passed to the callback function * function(result) { * // Default successProperty is `success` * if (!result.success) { * // Handle the error * } * } * ); * * ## Read method parameters * * Direct proxy provides options to help configure which parameters will be sent to the server * for Read operations. By setting the {@link #paramsAsHash} option to `true`, the proxy will * send an object literal containing each of the passed parameters. This is the default. When * {@link #paramsAsHash} is set to `false`, Proxy will pass the Read function an array of values * instead of an object, with the order determined by {@link #paramOrder} value. * * Setting {@link #paramOrder} to any value other than `undefined` will automatically reset * {@link #paramsAsHash} to `false`. * * # Example Usage * * Ext.define('User', { * extend: 'Ext.data.Model', * fields: ['firstName', 'lastName'] * }); * * Ext.define('Users', { * extend: 'Ext.data.Store', * model: 'User', * proxy: { * type: 'direct', * directFn: 'MyApp.getUsers', * // Tells the proxy to pass `start` and `limit` as two by-position arguments: * paramOrder: 'start,limit' * } * }); * * var store = new Users(); * store.load(); */Ext.define('Ext.data.proxy.Direct', { /* Begin Definitions */ extend: 'Ext.data.proxy.Server', alternateClassName: 'Ext.data.DirectProxy', alias: 'proxy.direct', requires: ['Ext.direct.Manager'], /* End Definitions */ /** * @cfg url * @hide */ config: { /** * @cfg {String/String[]} paramOrder * A list of params to be passed to server side Read function. Specify the params * in the order in which they must be executed on the server-side as either (1) * an Array of String values, or (2) a String of params delimited by either * whitespace, comma, or pipe. For example, any of the following would be * acceptable: * * paramOrder: ['param1','param2','param3'] * paramOrder: 'param1 param2 param3' * paramOrder: 'param1,param2,param3' * paramOrder: 'param1|param2|param' */ paramOrder: undefined, /** * @cfg {Boolean} paramsAsHash * Send Read function parameters as a collection of named arguments. Providing a * {@link #paramOrder} nullifies this configuration. */ paramsAsHash: true, /** * @cfg {Function/String} directFn * Function to call when executing a request. `directFn` is a simple alternative * to defining the api configuration parameter for Stores which will not * implement a full CRUD api. The `directFn` may also be a string reference to * the fully qualified name of the function, for example: * `'MyApp.company.GetProfile'`. This can be useful when using dynamic loading. * The string will be resolved before calling the function for the first time. */ directFn: undefined, /** * @cfg {Object} api * The same as {@link Ext.data.proxy.Server#api}, however instead of providing * urls you should provide a Direct function name for each CRUD method. * * Instead of providing fully qualified names for each function, you can use * `prefix` property to provide a common prefix for all functions: * * api: { * prefix: 'MyApp', * read: 'readRecords', * create: 'createRecords', * update: 'updateRecords', * destroy: 'destroyRecords' * } * * This way function names will be resolved to `'MyApp.readRecords'`, * `'MyApp.createRecords'`, etc. Note that using `prefix` and fully qualified * function names is **not** supported, and prefix will be used for every * function name when configured. * * See also {@link #directFn}. */ api: undefined, /** * @cfg {Object/Array} metadata * Optional set of fixed parameters to send with every Proxy request, similar to * {@link #extraParams} but available with all CRUD requests. Also unlike * {@link #extraParams}, metadata is not mixed with the ordinary data but sent * separately in the data packet. * You may need to update your server side Ext Direct stack to use this feature. */ metadata: undefined }, /** * @private */ paramOrderRe: /[\s,|]/, constructor: function(config) { this.callParent([config]); this.canceledOperations = {}; }, applyParamOrder: function(paramOrder) { if (Ext.isString(paramOrder)) { paramOrder = paramOrder.split(this.paramOrderRe); } return paramOrder; }, updateApi: function() { this.methodsResolved = false; }, updateDirectFn: function() { this.methodsResolved = false; }, resolveMethods: function() { var me = this, fn = me.getDirectFn(), api = me.getApi(), method; if (fn) { me.setDirectFn(method = Ext.direct.Manager.parseMethod(fn)); if (!Ext.isFunction(method)) { Ext.raise('Cannot resolve directFn ' + fn); } } if (api) { api = Ext.direct.Manager.resolveApi(api, me); me.setApi(api); } me.methodsResolved = true; }, doRequest: function(operation) { var me = this, writer, request, action, params, args, api, fn, callback; if (!me.methodsResolved) { me.resolveMethods(); } request = me.buildRequest(operation); action = request.getAction(); api = me.getApi(); if (api) { fn = api[action]; } fn = fn || me.getDirectFn(); //<debug> if (!fn || !fn.directCfg) { Ext.raise({ msg: 'No Ext Direct function specified for Direct proxy "' + action + '" operation', proxy: me }); } // This might lead to exceptions so bail out early if (!me.paramOrder && fn.directCfg.method.len > 1) { Ext.raise({ msg: 'Incorrect parameters for Direct proxy "' + action + '" operation', proxy: me }); } //</debug> writer = me.getWriter(); if (writer && operation.allowWrite()) { request = writer.write(request); } // The weird construct below is due to historical way of handling extraParams; // they were mixed in with request data in ServerProxy.buildRequest() and were // inseparable after that point. This does not work well with CUD operations // so instead of using potentially poisoned request params we took the raw // JSON data as Direct function argument payload (but only for CUD!). A side // effect of that was that the request metadata (extraParams) was only available // for read operations. // We keep this craziness for backwards compatibility. if (action === 'read') { params = request.getParams(); } else { params = request.getJsonData(); } args = fn.directCfg.method.getArgs({ params: params, allowSingle: writer.getAllowSingle(), paramOrder: me.getParamOrder(), paramsAsHash: me.getParamsAsHash(), paramsAsArray: true, metadata: me.getMetadata(), callback: me.createRequestCallback(request, operation), scope: me }); request.setConfig({ args: args, directFn: fn }); fn.apply(window, args); // Store expects us to return something to indicate that the request // is pending; not doing so will make a buffered Store repeat the // requests over and over. return request; }, /** * Aborts a running request by operation. * * @param {Ext.data.operation.Operation} operation The operation to abort. This parameter * is mandatory. */ abort: function(operation) { var id; // Assume this can be called with request instead of operation, a la Ajax proxy if (operation && operation.isDataRequest) { operation = operation.getOperation(); } // Check definedness again, the above could have returned null if (operation && operation.isOperation) { id = operation.id; } // We cannot abort a running request but we can ignore the data when it comes back. if (id != null) { this.canceledOperations[id] = true; } }, /** * @method applyEncoding * @inheritdoc */ applyEncoding: Ext.identityFn, createRequestCallback: function(request, operation) { var me = this; return function(data, event) { if (!me.canceledOperations[operation.id]) { me.processResponse(event.status, operation, request, event); } delete me.canceledOperations[operation.id]; }; }, /** * @method extractResponseData * @inheritdoc */ extractResponseData: function(response) { return Ext.isDefined(response.result) ? response.result : response.data; }, /** * @method setException * @inheritdoc */ setException: function(operation, response) { operation.setException(response.message); }, /** * @method buildUrl * @inheritdoc */ buildUrl: function() { return ''; }});