added java/ dirs

Author: jayunit100

src/main/java/org/apache/hadoop/fs/glusterfs/GlusterFSBrickClass.java

@@ -0,0 +1,109 @@
+/**
+ *
+ * Copyright (c) 2011 Gluster, Inc. <http://www.gluster.com>
+ * This file is part of GlusterFS.
+ *
+ * Licensed 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.hadoop.fs.glusterfs;
+
+import java.io.*;
+
+public class GlusterFSBrickClass {
+        String  host;
+        String  exportedFile;
+        long    start;
+        long    end;
+        boolean isChunked;
+        int     stripeSize;     // Stripe size in bytes
+        int     nrStripes;      // number of stripes
+        int     switchCount;    // for SR, DSR - number of replicas of each stripe
+                                // -1 for others
+
+        public GlusterFSBrickClass (String brick, long start, long len, boolean flag,
+                                    int stripeSize, int nrStripes, int switchCount)
+                throws IOException {
+                this.host = brick2host(brick);
+                this.exportedFile = brick2file(brick);
+                this.start = start;
+                this.end = start + len;
+                this.isChunked = flag;
+                this.stripeSize = stripeSize;
+                this.nrStripes = nrStripes;
+                this.switchCount = switchCount;
+        }
+
+        public boolean isChunked () {
+                return isChunked;
+        }
+
+        public String brickIsLocal(String hostname) {
+                String path = null;
+                File f = null;
+                if (host.equals(hostname))
+                        path = exportedFile;
+
+                return path;
+        }
+
+        public int[] getBrickNumberInTree(long start, int len) {
+                long end = len;
+                int startNodeInTree = ((int) (start / stripeSize)) % nrStripes;
+                int endNodeInTree = ((int) ((start + len) / stripeSize)) % nrStripes;
+
+                if (startNodeInTree != endNodeInTree) {
+                        end = (start - (start % stripeSize)) + stripeSize;
+                        end -= start;
+                }
+
+                return new int[] {startNodeInTree, endNodeInTree, (int) end};
+        }
+
+        public boolean brickHasFilePart(int nodeInTree, int nodeLoc) {
+                if (switchCount == -1)
+                        return (nodeInTree == nodeLoc);
+
+                nodeInTree *= switchCount;
+                for (int i = nodeInTree; i < (nodeInTree + switchCount); i++) {
+                        if (i == nodeLoc)
+                                return true;
+                }
+
+                return false;
+        }
+
+        public String brick2host (String brick)
+                throws IOException {
+                String[] hf = null;
+
+                hf = brick.split(":");
+                if (hf.length != 2)
+                        throw new IOException("Error getting hostname from brick");
+
+                return hf[0];
+        }
+
+        public String brick2file (String brick)
+                throws IOException {
+                String[] hf = null;
+
+                hf = brick.split(":");
+                if (hf.length != 2)
+                        throw new IOException("Error getting hostname from brick");
+
+                return hf[1];
+        }
+
+}

src/main/java/org/apache/hadoop/fs/glusterfs/GlusterFSBrickRepl.java

@@ -0,0 +1,52 @@
+/**
+ *
+ * Copyright (c) 2011 Gluster, Inc. <http://www.gluster.com>
+ * This file is part of GlusterFS.
+ *
+ * Licensed 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.hadoop.fs.glusterfs;
+
+import java.io.*;
+
+public class GlusterFSBrickRepl {
+        private String[] replHost;
+        private long start;
+        private long len;
+        private int cnt;
+
+        GlusterFSBrickRepl(int replCount, long start, long len) {
+                this.replHost = new String[replCount];
+                this.start = start;
+                this.len = len;
+                this.cnt = 0;
+        }
+
+        public void addHost (String host) {
+                this.replHost[cnt++] = host;
+        }
+
+        public String[] getReplHosts () {
+                return this.replHost;
+        }
+
+        public long getStartLen () {
+                return this.start;
+        }
+
+        public long getOffLen () {
+                return this.len;
+        }
+}