X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fio%2FBackupFiles.java;h=14c1260bbac561167382e2af1f2f2329ad79a589;hb=427c5af6eb8378c4a9d5bf6a967f55ab8fd253a5;hp=529e1b2acfe66f2f65fc1bcae8d491b72972f777;hpb=69f09dd6dbf67c00c27fdcfecbbcc932e7eac6a9;p=jalview.git

diff --git a/src/jalview/io/BackupFiles.java b/src/jalview/io/BackupFiles.java
index 529e1b2..14c1260 100644
--- a/src/jalview/io/BackupFiles.java
+++ b/src/jalview/io/BackupFiles.java
@@ -32,6 +32,11 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
 
 import jalview.bin.Cache;
 import jalview.bin.Console;
@@ -106,8 +111,14 @@ public class BackupFiles
 
   private static final String oldTempFileSuffix = "_oldfile_tobedeleted";
 
+  // thread pool used for completablefutures
+  private static final ExecutorService executorService = Executors
+          .newFixedThreadPool(3);
+
   private static List<BackupFiles> savesInProgress = new ArrayList<>();
 
+  private CompletableFuture<Boolean> myFuture = null;
+
   private boolean addSaveInProgress()
   {
     if (savesInProgress.contains(this))
@@ -116,42 +127,101 @@ public class BackupFiles
     }
     else
     {
+      this.setMyFuture();
       savesInProgress.add(this);
       return true;
     }
   }
 
-  private boolean removeSaveInProgress()
+  private boolean removeSaveInProgress(boolean ret)
   {
     if (savesInProgress.contains(this))
     {
+      this.getMyFuture().complete(ret);
       // remove all occurrences
       while (savesInProgress.remove(this))
       {
       }
       return true;
     }
-    else
+    return false;
+  }
+
+  private static CompletableFuture<Boolean> getNewFuture()
+  {
+    return new CompletableFuture<Boolean>()
     {
-      return false;
-    }
+    };
+  }
+
+  private CompletableFuture<Boolean> getMyFuture()
+  {
+    return this.myFuture;
+  }
+
+  private void setMyFuture()
+  {
+    this.myFuture = getNewFuture();
   }
 
   public static boolean hasSavesInProgress()
   {
-    return savesInProgress.size() > 0;
+    boolean has = false;
+    for (CompletableFuture cf : savesInProgressCompletableFutures(true))
+    {
+      has |= !cf.isDone();
+    }
+    return has;
   }
 
-  public static List<File> savesInProgressFiles()
+  public static List<File> savesInProgressFiles(boolean all)
   {
     List<File> files = new ArrayList<>();
     for (BackupFiles bfile : savesInProgress)
     {
-      files.add(bfile.getFile());
+      if (all || !bfile.getMyFuture().isDone())
+        files.add(bfile.getFile());
     }
     return files;
   }
 
+  public static List<CompletableFuture<Boolean>> savesInProgressCompletableFutures(
+          boolean all)
+  {
+    List<CompletableFuture<Boolean>> cfs = new ArrayList<>();
+    for (BackupFiles bfile : savesInProgress)
+    {
+      if (all || !bfile.getMyFuture().isDone())
+        cfs.add(bfile.getMyFuture());
+    }
+    return cfs;
+  }
+
+  public static Future<Boolean> allSaved()
+  {
+    CompletableFuture<Boolean> f = new CompletableFuture<>();
+
+    executorService.submit(() -> {
+      for (BackupFiles buf : savesInProgress)
+      {
+        boolean allSaved = true;
+        try
+        {
+          allSaved &= buf.getMyFuture().get();
+        } catch (InterruptedException e)
+        {
+          Console.debug("InterruptedException waiting for files to save",
+                  e);
+        } catch (ExecutionException e)
+        {
+          Console.debug("ExecutionException waiting for files to save", e);
+        }
+        f.complete(allSaved);
+      }
+    });
+    return f;
+  }
+
   public BackupFiles(String filename)
   {
     this(new File(filename));
@@ -183,6 +253,7 @@ public class BackupFiles
       {
         String tempfilename = file.getName();
         File tempdir = file.getParentFile();
+        tempdir.mkdirs();
         Console.trace(
                 "BACKUPFILES [file!=null] attempting to create temp file for "
                         + tempfilename + " in dir " + tempdir);
@@ -871,7 +942,7 @@ public class BackupFiles
     }
 
     // remove this file from the save in progress stack
-    removeSaveInProgress();
+    removeSaveInProgress(rename);
 
     return rename;
   }