added backup.db and backup.ontology plugins

[simantics/platform.git] / bundles / org.simantics.backup.db / src / org / simantics / backup / db / ModelledBackup.java

diff --git a/bundles/org.simantics.backup.db/src/org/simantics/backup/db/ModelledBackup.java b/bundles/org.simantics.backup.db/src/org/simantics/backup/db/ModelledBackup.java
new file mode 100644 (file)
index 0000000..258915c
--- /dev/null
+++ b/bundles/org.simantics.backup.db/src/org/simantics/backup/db/ModelledBackup.java
@@ -0,0 +1,82 @@
+package org.simantics.backup.db;\r
+\r
+import java.nio.file.Path;\r
+import java.util.concurrent.Callable;\r
+import java.util.concurrent.Future;\r
+import java.util.concurrent.FutureTask;\r
+\r
+import org.simantics.backup.BackupException;\r
+import org.simantics.backup.IBackupProvider;\r
+import org.simantics.scl.runtime.function.Function1;\r
+import org.simantics.scl.runtime.function.Function2;\r
+import org.simantics.scl.runtime.tuple.Tuple0;\r
+\r
+public class ModelledBackup implements IBackupProvider {\r
+\r
+    private final Function1<Tuple0, Object> lockFunc;\r
+    private final Function2<String, Integer, Function1<Tuple0, String>> backupFunc;\r
+    private final Function1<Tuple0, Object> unlockFunc;\r
+    private final Function2<String, Integer, Object> restoreFunc;\r
+\r
+    private ModelledBackup(\r
+            Function1<Tuple0, Object> lockFunc,\r
+            Function2<String, Integer, Function1<Tuple0, String>> backupFunc,\r
+            Function1<Tuple0, Object> unlockFunc,\r
+            Function2<String, Integer, Object> restoreFunc) {\r
+        this.lockFunc = lockFunc;\r
+        this.backupFunc = backupFunc;\r
+        this.unlockFunc = unlockFunc;\r
+        this.restoreFunc = restoreFunc;\r
+    }\r
+\r
+    @Override\r
+    public void lock() {\r
+        lockFunc.apply(Tuple0.INSTANCE);\r
+    }\r
+\r
+    @Override\r
+    public Future<BackupException> backup(Path targetPath, int revision) {\r
+\r
+       final Function1<Tuple0, String> fn = backupFunc.apply(targetPath.toString(), revision);\r
+       \r
+       final FutureTask<BackupException> futureTask = new FutureTask<BackupException>(new Callable<BackupException>() {\r
+                       @Override\r
+                       public BackupException call() throws Exception {\r
+                               try {\r
+                                       String error = fn.apply(Tuple0.INSTANCE);\r
+                                       if (error != null) {\r
+                                               return new BackupException(error);\r
+                                       } else {\r
+                                               return null;\r
+                                       }\r
+                               } catch (Throwable t) {\r
+                                       return new BackupException(t);\r
+                               }\r
+                       }\r
+       });\r
+        \r
+       Thread thread = new Thread(futureTask, "Backup Provider Thread " + backupFunc.toString());\r
+       thread.start();\r
+\r
+       return futureTask;\r
+    }\r
+\r
+    @Override\r
+    public void unlock() {\r
+        unlockFunc.apply(Tuple0.INSTANCE);\r
+    }\r
+\r
+    @Override\r
+    public void restore(Path fromPath, int revision) {\r
+        restoreFunc.apply(fromPath.toString(), revision);\r
+    }\r
+\r
+    public static IBackupProvider modelledBackup(\r
+            Function1<Tuple0, Object> lockFunc,\r
+            Function2<String, Integer, Function1<Tuple0, String>> backupFunc,\r
+            Function1<Tuple0, Object> unlockFunc,\r
+            Function2<String, Integer, Object> restoreFunc) {\r
+\r
+        return new ModelledBackup(lockFunc, backupFunc, unlockFunc, restoreFunc);\r
+    }\r
+}\r