Improved resource access caching

* Smarter caching. ResourceAccess instances close after a timeout, if not reused.
* Introduced a start command to avoid race condition when sending
commands to a resource that is currently shutting down.
* We resend pending commands after we lost access to the resource
* unexpectedly.

1 files changed, 9 insertions, 0 deletions

diff --git a/common/clientapi.h b/common/clientapi.h
index 8f87562..edf42e4 100644
--- a/common/clientapi.h
+++ b/common/clientapi.h
@@ -80,6 +80,15 @@ public:
     static KAsync::Job<void> shutdown(const QByteArray &resourceIdentifier);
 
     /**
+     * Start resource.
+     * 
+     * The resource is ready for operation once this command completes.
+     * This command is only necessary if a resource was shutdown previously,
+     * otherwise the resource process will automatically start as necessary.
+     */
+    static KAsync::Job<void> start(const QByteArray &resourceIdentifier);
+
+    /**
      * Synchronize data to local cache.
      */
     static KAsync::Job<void> synchronize(const Akonadi2::Query &query);