The last part of the factory is responsible for returning a new derived message object. in Visual Studio .NET

Creator Code 3/9 in Visual Studio .NET The last part of the factory is responsible for returning a new derived message object.
The last part of the factory is responsible for returning a new derived message object.
Decoding Code 39 Extended In Visual Studio .NET
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in .NET framework applications.
conn::MMessage* TFactory::NewMessageL() { CHeader* hdr = new (ELeave) CHeader();
Creating Code 3 Of 9 In VS .NET
Using Barcode encoder for .NET framework Control to generate, create Code 39 Extended image in VS .NET applications.
DEVELOPING AN ECHO SOCKET SERVER
Scanning Code39 In Visual Studio .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
CleanupStack::PushL(hdr); conn::CMessage* msg = conn::CMessage::NewL(hdr, conn::EBig); CleanupStack::Pop(); //hdr return msg; }
Drawing Barcode In .NET Framework
Using Barcode generator for .NET Control to generate, create barcode image in .NET framework applications.
The Socket Client and Server Classes
Barcode Recognizer In Visual Studio .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
In this case we do not have any need to create a derived client socket class. We will create a simple echo server socket class. This has to address several needs: It derives from MServerSocketObserver to be noti ed when the server socket stops. It owns a CServerSocket and a factory object. It provides a singleton reference to itself to allow global access. For the echo server we don t need this, but it can be useful when the server controls global resources. Otherwise, it is a standard server.
ANSI/AIM Code 39 Encoder In C#
Using Barcode creator for VS .NET Control to generate, create Code 39 image in .NET applications.
class CEchoServer : public CBase, public conn::MServerSocketObserver { public: static CEchoServer* NewLC(); static void StartL(); CEchoServer(); // From MServerSocketObserver void ServerSocketStoppedDueToErr(TInt aError); // Singleton to provide global access to the server static CEchoServer*& EchoServer(); private: CEchoServer(); void ConstructL(); private: conn::CServerSocket* iServerSocket; TFactory iFactory; };
Make Code 39 In .NET
Using Barcode generator for ASP.NET Control to generate, create Code 39 Full ASCII image in ASP.NET applications.
The singleton is straightforward:
Generating Code 3 Of 9 In Visual Basic .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create Code39 image in VS .NET applications.
CEchoServer*& CEchoServer::EchoServer() {
Generate Bar Code In .NET Framework
Using Barcode creation for .NET framework Control to generate, create barcode image in VS .NET applications.
DEVELOPING SOCKET SERVERS
Code 39 Extended Generation In .NET Framework
Using Barcode creation for VS .NET Control to generate, create Code 3 of 9 image in .NET framework applications.
static CEchoServer* _pThis = NULL; return _pThis; }
Generate Data Matrix ECC200 In .NET
Using Barcode encoder for VS .NET Control to generate, create Data Matrix 2d barcode image in .NET applications.
The creation and startup code is standard two-stage construction that creates and starts a CServerSocket object and runs it as an Active Object. We will need to create a TServerInfo object to con gure the server socket. In this case we will set the port number to 0 to get a random, dynamically generated port number rather than a xed number.
Print Industrial 2 Of 5 In .NET Framework
Using Barcode generator for .NET framework Control to generate, create Standard 2 of 5 image in .NET applications.
const TUint16 KEchoPortNumber = 0; const TUint16 KServerQueueLength = 5; _LIT(KEchoServerName, "com.symbian.echo");
Decode Code 128 In .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
CEchoServer* CEchoServer::NewLC() { CEchoServer* self = new(ELeave) CEchoServer(); CleanupStack::PushL(self); self->ConstructL(); return self; } CEchoServer::CEchoServer() { } void CEchoServer::ConstructL() { conn::TServerInfo serverInfo(&iFactory, KEchoPortNumber, KServerQueueLength, KEchoServerName, this); iServerSocket = conn::CServerSocket::NewL(serverInfo); iServerSocket->StartL(); } void CEchoServer::StartL() { CActiveScheduler* scheduler = new(ELeave)CActiveScheduler(); CleanupStack::PushL(scheduler); CActiveScheduler::Install(scheduler); EchoServer() = CEchoServer::NewLC(); scheduler->Start(); CleanupStack::PopAndDestroy(EchoServer()); CleanupStack::PopAndDestroy(scheduler); } CEchoServer:: CEchoServer() { delete iServerSocket; }
Paint GS1 - 13 In VB.NET
Using Barcode printer for .NET framework Control to generate, create EAN-13 Supplement 5 image in .NET framework applications.
In this case, if the socket server stops due to an error then we don t have anything to do except stop the Active Scheduler. This is normally called when the connection is dropped.
Bar Code Decoder In .NET Framework
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET applications.
INSTALLING AND REGISTERING A SERVER SOCKET SERVICE
Bar Code Decoder In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
void CEchoServer::ServerSocketStoppedDueToErr(TInt aError) { CActiveScheduler::Stop(); }
GS1-128 Generation In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create EAN128 image in ASP.NET applications.
The nal piece in the jigsaw is to set up the executable startup. The code for a Symbian OS EKA1 smartphone is:
GS1 - 13 Decoder In .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET framework applications.
TInt E32Dll(TDllReason) { return KErrNone; } TInt E32Main() { __UHEAP_MARK; CTrapCleanup* cleanupStack = CTrapCleanup::New(); TRAPD(error, CEchoServer::StartL()); delete cleanupStack; __UHEAP_MARKEND; return 0; }
Code 128 Code Set C Generator In Java
Using Barcode generator for Java Control to generate, create Code 128 Code Set C image in Java applications.
while the code for an EKA2 smartphone is:
Bar Code Maker In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create barcode image in ASP.NET applications.
GLDEF_C TInt E32Main() { __UHEAP_MARK; CTrapCleanup* cleanupStack = CTrapCleanup::New(); TRAPD(error, CEchoServer::StartL()); delete cleanupStack; __UHEAP_MARKEND; return 0; }
We can now build the echo socket server and try to run it.
8.6 Installing and Registering a Server Socket Service
Having built our echo socket server, it still needs to be installed and registered. In order for a socket server to be started by the Service Broker, it must be located in the \system\programs directory and must be registered. The Connectivity socket servers that are shipped with a Symbian OS phone are located on the z:\system\programs directory on the ROM, so extra servers need to go in the c:\system\programs directory. As with the custom server, building a socket server for the emulator will automatically put it in the right place on the mapped ROM drive. For
DEVELOPING SOCKET SERVERS
a real device or a reference board, we can either copy the binary into place or create a .sis installer le. As well as placing the server in the right location, we need to create a service registration le for the Service Broker. This provides a name and version for the service and associates the name with the server executable. The service le is an XML le and has a very simple structure. One or more service les will exist in ROM on the mobile phone, but it is possible to create additional service les and place them on the c: drive. In fact, it is essential to create additional service les if we want to use additional services. Here is a service le that will register our echo server.
< xml version="1.0" encoding="UTF-16" standalone="yes" > <service_registration> <service name="com.symbian.echo" exepath="echoss" version="1.0 0" processname="echoss" /> </service_registration>
The service name attribute is the name that will be published on the PC. You can use any name you like, but Symbian recommends the use of a reverse domain name convention (also seen in naming Java classes) to guarantee that your name is unique and will not clash with another server from another developer. The exepath attribute is the name of the executable as xed in your mmp le, but without the .exe or .dll extension. The version attribute is a version string that will be provided to the PC as part of the information about the service. This can be used to detect different versions of the server and potentially enables the PC client to handle different versions by making allowances for the differences. The process name attribute is used in EKA1 implementations to set the name of the loaded DLL. You should note that building the server will not copy the service registration le into the right place; you need to place that manually if you are using the emulator. Service Broker registration les go into the System\Data\ServiceBroker directory, on either the z: drive or the c: drive. The use of makesis was covered in 6, but here is a package le that will install the echo server socket with no certi cate (you would provide a real certi cate in practice). This is echoss.pkg.
; SIS package file for Echo Socket Server ; ; Language - only English but no included text anyway &EN ; Caption, UID and version #{"Echo Socket Server"},(0x101FEAFD),0,0,0