Multiple reader thread support for db client

[simantics/platform.git] / bundles / org.simantics.db.impl / src / org / simantics / db / impl / query / CollectionUnaryQuery.java

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java
index bde26c36d319cfcb5445f227717ad40b93fe1c5c..90bb0355447acfeac8089b3f080d435f062a23e8 100644 (file)
--- a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/CollectionUnaryQuery.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * Copyright (c) 2007, 2018 Association for Decentralized Information Management
  * in Industry THTH ry.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
@@ -11,22 +11,25 @@
  *******************************************************************************/
 package org.simantics.db.impl.query;
 
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.impl.graph.ReadGraphImpl;
+import org.simantics.db.impl.procedure.IntProcedureAdapter;
 
-
-
-abstract public class CollectionUnaryQuery<T> extends UnaryQuery<T> {
+public abstract class CollectionUnaryQuery extends UnaryQuery<IntProcedure> implements IntProcedure {
     
     public CollectionUnaryQuery(final int id) {
         super(id);
     }
     
+    public abstract void compute(ReadGraphImpl graph, IntProcedure procedure) throws DatabaseException;
+
     @Override
-    public void clearResult(QuerySupport support) {
+    public final void clearResult(QuerySupport support) {
        setResult(new IntArray());
     }
     
     @Override
-    public void setReady() {
+    public final void setReady() {
        super.setReady();
        IntArray v = (IntArray)getResult();
        int size = v.size();
@@ -34,4 +37,63 @@ abstract public class CollectionUnaryQuery<T> extends UnaryQuery<T> {
         else v.trim();
     }
     
+    @Override
+    public final Object performFromCache(ReadGraphImpl graph, final IntProcedure procedure) throws DatabaseException {
+
+        assert(isReady());
+
+        if(handleException(graph, procedure)) return EXCEPTED;
+        
+        final IntArray value = (IntArray)getResult();
+        if(value.data == null) {
+            if(value.sizeOrData != IntArray.NO_DATA) procedure.execute(graph, value.sizeOrData);
+        } else {
+            for(int i = 0;i < value.sizeOrData ; i++) procedure.execute(graph, value.data[i]);
+        }
+
+        procedure.finished(graph);
+        
+        return getResult();
+
+    }
+
+    @Override
+    public final void recompute(ReadGraphImpl graph) throws DatabaseException {
+
+        compute(graph, new IntProcedureAdapter() {
+
+            @Override
+            public void finished(ReadGraphImpl graph) {
+            }
+
+            @Override
+            public void exception(ReadGraphImpl graph, Throwable t) {
+                new Error("Error in recompute.", t).printStackTrace();
+            }
+
+        });
+
+    }
+    
+    @Override
+    final boolean isImmutable(ReadGraphImpl graph) {
+        return graph.processor.isImmutable(id);
+    }
+
+    @Override
+    public final void execute(ReadGraphImpl graph, int i) throws DatabaseException {
+        IntArray v = (IntArray)getResult();
+        v.add(i);
+    }
+
+    @Override
+    public final void finished(ReadGraphImpl graph) throws DatabaseException {
+        setReady();
+    }
+
+    @Override
+    public final void exception(ReadGraphImpl graph, Throwable throwable) throws DatabaseException {
+        except(throwable);
+    }
+
 }