BUG-5280: add FrontendMetadata

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / FrontendClientMetadataBuilder.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/FrontendClientMetadataBuilder.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/FrontendClientMetadataBuilder.java
new file mode 100644 (file)
index 0000000..0dab830
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/FrontendClientMetadataBuilder.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.cluster.datastore;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Collections2;
+import com.google.common.collect.Range;
+import com.google.common.collect.RangeSet;
+import com.google.common.collect.TreeRangeSet;
+import com.google.common.primitives.UnsignedLong;
+import java.util.HashMap;
+import java.util.Map;
+import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
+import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
+import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
+import org.opendaylight.controller.cluster.datastore.persisted.FrontendClientMetadata;
+import org.opendaylight.controller.cluster.datastore.persisted.FrontendHistoryMetadata;
+import org.opendaylight.yangtools.concepts.Builder;
+import org.opendaylight.yangtools.concepts.Identifiable;
+
+final class FrontendClientMetadataBuilder implements Builder<FrontendClientMetadata>, Identifiable<ClientIdentifier> {
+    private final Map<LocalHistoryIdentifier, FrontendHistoryMetadataBuilder> currentHistories = new HashMap<>();
+    private final RangeSet<UnsignedLong> purgedHistories;
+    private final ClientIdentifier identifier;
+
+    FrontendClientMetadataBuilder(final ClientIdentifier identifier) {
+        this.identifier = Preconditions.checkNotNull(identifier);
+        purgedHistories = TreeRangeSet.create();
+    }
+
+    FrontendClientMetadataBuilder(final FrontendClientMetadata meta) {
+        this.identifier = Preconditions.checkNotNull(meta.getIdentifier());
+        purgedHistories = TreeRangeSet.create(meta.getPurgedHistories());
+
+        for (FrontendHistoryMetadata h : meta.getCurrentHistories()) {
+            final FrontendHistoryMetadataBuilder b = new FrontendHistoryMetadataBuilder(identifier, h);
+            currentHistories.put(b.getIdentifier(), b);
+        }
+    }
+
+    @Override
+    public FrontendClientMetadata build() {
+        return new FrontendClientMetadata(identifier, purgedHistories,
+            Collections2.transform(currentHistories.values(), FrontendHistoryMetadataBuilder::build));
+    }
+
+    @Override
+    public ClientIdentifier getIdentifier() {
+        return identifier;
+    }
+
+    void onHistoryClosed(final LocalHistoryIdentifier historyId) {
+        ensureHistory(historyId).onHistoryClosed();
+    }
+
+    void onHistoryPurged(final LocalHistoryIdentifier historyId) {
+        currentHistories.remove(historyId);
+        // XXX: do we need to account for cookies?
+        purgedHistories.add(Range.singleton(UnsignedLong.fromLongBits(historyId.getHistoryId())));
+    }
+
+    void onTransactionCommitted(final TransactionIdentifier txId) {
+        ensureHistory(txId.getHistoryId()).onTransactionCommitted(txId);
+    }
+
+    private FrontendHistoryMetadataBuilder ensureHistory(final LocalHistoryIdentifier historyId) {
+        final FrontendHistoryMetadataBuilder existing = currentHistories.get(historyId);
+        if (existing != null) {
+            return existing;
+        }
+
+        final FrontendHistoryMetadataBuilder ret = new FrontendHistoryMetadataBuilder(historyId);
+        currentHistories.put(historyId, ret);
+        return ret;
+    }
+}