incubator-batchee git commit: MultiWriterBase to make it easier to route to writer with a custom policy

[rm...@apache.org]

Repository: incubator-batchee
Updated Branches:
  refs/heads/master 3b48997bf -> c30a63938


MultiWriterBase to make it easier to route to writer with a custom policy


Project: http://git-wip-us.apache.org/repos/asf/incubator-batchee/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-batchee/commit/c30a6393
Tree: http://git-wip-us.apache.org/repos/asf/incubator-batchee/tree/c30a6393
Diff: http://git-wip-us.apache.org/repos/asf/incubator-batchee/diff/c30a6393

Branch: refs/heads/master
Commit: c30a63938a24653266b063ef3759a4991babead3
Parents: 3b48997
Author: Romain Manni-Bucau <rm...@gmail.com>
Authored: Fri Nov 20 14:29:29 2015 -0800
Committer: Romain Manni-Bucau <rm...@gmail.com>
Committed: Fri Nov 20 14:29:29 2015 -0800

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 .../batchee/extras/writer/MultiWriterBase.java  | 75 ++++++++++++++++++++
 1 file changed, 75 insertions(+)
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http://git-wip-us.apache.org/repos/asf/incubator-batchee/blob/c30a6393/extensions/extras/src/main/java/org/apache/batchee/extras/writer/MultiWriterBase.java
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diff --git a/extensions/extras/src/main/java/org/apache/batchee/extras/writer/MultiWriterBase.java b/extensions/extras/src/main/java/org/apache/batchee/extras/writer/MultiWriterBase.java
new file mode 100644
index 0000000..affcc20
--- /dev/null
+++ b/extensions/extras/src/main/java/org/apache/batchee/extras/writer/MultiWriterBase.java
@@ -0,0 +1,75 @@
+/*
+ * 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.batchee.extras.writer;
+
+import javax.batch.api.chunk.ItemWriter;
+import java.io.Serializable;
+
+public abstract class MultiWriterBase implements ItemWriter {
+    protected ItemWriter writer1;
+    protected ItemWriter writer2;
+
+    protected MultiWriterBase() {
+        // no-op
+    }
+
+    protected MultiWriterBase(final ItemWriter writer1, final ItemWriter writer2) {
+        init(writer1, writer2);
+    }
+
+    protected void init(final ItemWriter writer1, final ItemWriter writer2) {
+        this.writer1 = writer1;
+        this.writer2 = writer2;
+    }
+
+    @Override
+    public void open(final Serializable serializable) throws Exception {
+        if (Checkpoint.class.isInstance(serializable)) {
+            final Checkpoint cp = Checkpoint.class.cast(serializable);
+            writer1.open(cp.checkpoint1);
+            writer2.open(cp.checkpoint2);
+        } else if (serializable != null) {
+            throw new IllegalArgumentException(serializable + " unsupported");
+        }
+    }
+
+    @Override
+    public void close() throws Exception {
+        try {
+            writer1.close();
+        } catch (final Exception e) {
+            writer2.close();
+            throw e;
+        }
+        writer2.close();
+    }
+
+    @Override
+    public Serializable checkpointInfo() throws Exception {
+        return new Checkpoint(writer1.checkpointInfo(), writer2.checkpointInfo());
+    }
+
+    public static class Checkpoint implements Serializable {
+        private Serializable checkpoint1;
+        private Serializable checkpoint2;
+
+        public Checkpoint(final Serializable checkpoint1, final Serializable checkpoint2) {
+            this.checkpoint1 = checkpoint1;
+            this.checkpoint2 = checkpoint2;
+        }
+    }
+}