ignite git commit: Added schema version.

[vo...@apache.org]

Repository: ignite
Updated Branches:
  refs/heads/ignite-4565-ddl f79ead47a -> d97716ef9


Added schema version.


Project: http://git-wip-us.apache.org/repos/asf/ignite/repo
Commit: http://git-wip-us.apache.org/repos/asf/ignite/commit/d97716ef
Tree: http://git-wip-us.apache.org/repos/asf/ignite/tree/d97716ef
Diff: http://git-wip-us.apache.org/repos/asf/ignite/diff/d97716ef

Branch: refs/heads/ignite-4565-ddl
Commit: d97716ef9024aea562899d0b8b17c32c49e41f4b
Parents: f79ead4
Author: devozerov <vo...@gridgain.com>
Authored: Fri Mar 3 15:40:00 2017 +0300
Committer: devozerov <vo...@gridgain.com>
Committed: Fri Mar 3 15:40:00 2017 +0300

----------------------------------------------------------------------
 .../query/h2/ddl/DdlSchemaVersion.java          | 91 ++++++++++++++++++++
 1 file changed, 91 insertions(+)
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http://git-wip-us.apache.org/repos/asf/ignite/blob/d97716ef/modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/ddl/DdlSchemaVersion.java
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diff --git a/modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/ddl/DdlSchemaVersion.java b/modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/ddl/DdlSchemaVersion.java
new file mode 100644
index 0000000..50c292c
--- /dev/null
+++ b/modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/ddl/DdlSchemaVersion.java
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.processors.query.h2.ddl;
+
+import org.apache.ignite.internal.util.typedef.internal.S;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * DDL schema version. Defines certain schema state and allows to filter unwanted stale events.
+ */
+public class DdlSchemaVersion implements Comparable<DdlSchemaVersion> {
+    /** Topology version. */
+    private final long topVer;
+
+    /** Counter. */
+    private final long ctr;
+
+    /**
+     * Constructor.
+     *
+     * @param topVer Topology version.
+     * @param ctr Counter.
+     */
+    public DdlSchemaVersion(long topVer, long ctr) {
+        this.topVer = topVer;
+        this.ctr = ctr;
+    }
+
+    /**
+     * @return Topology version.
+     */
+    public long topologyVersion() {
+        return topVer;
+    }
+
+    /**
+     * @return Counter.
+     */
+    public long counter() {
+        return ctr;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int hashCode() {
+        return 31 * (int)(topVer ^ (topVer >>> 32)) + (int)(ctr ^ (ctr >>> 32));
+    }
+
+    /** {@inheritDoc} */
+    @Override public boolean equals(Object obj) {
+        if (obj == this)
+            return true;
+
+        if (obj != null && obj instanceof DdlSchemaVersion) {
+            DdlSchemaVersion other = (DdlSchemaVersion)obj;
+
+            return ctr == other.ctr && topVer == other.topVer;
+        }
+
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    @Override public int compareTo(@NotNull DdlSchemaVersion other) {
+        long delta = topVer - other.topVer;
+
+        if (delta == 0)
+            delta = ctr - other.ctr;
+
+        return delta > 0 ? 1 : delta < 0 ? -1 : 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override public String toString() {
+        return S.toString(DdlSchemaVersion.class, this);
+    }
+}