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2a4684a28d
Example of race condition during rendering: Threads 1 and 2 call get(), it checks that there are cached credentials. Thread 1 takes the cached credentials, thread 2 will get no data -> will request credentials in dialog
67 lines
1.8 KiB
Plaintext
67 lines
1.8 KiB
Plaintext
class QgsCredentials
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{
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%TypeHeaderCode
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#include <qgscredentials.h>
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%End
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public:
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//! virtual destructor
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virtual ~QgsCredentials();
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bool get( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null );
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void put( QString realm, QString username, QString password );
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//! retrieves instance
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static QgsCredentials *instance();
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/**
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* Lock the instance against access from multiple threads. This does not really lock access to get/put methds,
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* it will just prevent other threads to lock the instance and continue the execution. When the class is used
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* from non-GUI threads, they should call lock() before the get/put calls to avoid race conditions.
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* @note added in 2.4
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*/
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void lock();
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/**
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* Unlock the instance after being locked.
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* @note added in 2.4
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*/
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void unlock();
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protected:
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QgsCredentials();
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//! request a password
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virtual bool request( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null ) = 0;
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//! register instance
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void setInstance( QgsCredentials *theInstance );
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private:
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QgsCredentials( const QgsCredentials& );
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};
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/**
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\brief Default implementation of credentials interface
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This class outputs message to the standard output and retrieves input from
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standard input. Therefore it won't be the right choice for apps without
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GUI.
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*/
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class QgsCredentialsConsole : QObject, QgsCredentials
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{
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%TypeHeaderCode
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#include <qgscredentials.h>
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%End
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public:
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QgsCredentialsConsole();
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signals:
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//! signals that object will be destroyed and shouldn't be used anymore
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void destroyed();
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protected:
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virtual bool request( QString realm, QString &username /In,Out/, QString &password /In,Out/, QString message = QString::null );
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};
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