HBASE-9667 NullOutputStream removed from Guava 15

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1528573 13f79535-47bb-0310-9956-ffa450edef68

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java

@@ -29,8 +29,6 @@ import java.util.Map;
 import java.util.NavigableMap;
 import java.util.TreeMap;
 
-import javax.annotation.Nullable;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.hbase.Cell;

hbase-common/src/main/java/org/apache/hadoop/hbase/io/LimitInputStream.java

@@ -0,0 +1,104 @@
+/*
+ *
+ * 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.hadoop.hbase.io;
+
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Copied from guava source code v15 (LimitedInputStream)
+ * Guava deprecated LimitInputStream in v14 and removed it in v15. Copying this class here
+ * allows to be compatible with guava 11 to 15+.
+ */
+public final class LimitInputStream extends FilterInputStream {
+  private long left;
+  private long mark = -1;
+
+  public LimitInputStream(InputStream in, long limit) {
+    super(in);
+    checkNotNull(in);
+    checkArgument(limit >= 0, "limit must be non-negative");
+    left = limit;
+  }
+
+  @Override
+  public int available() throws IOException {
+    return (int) Math.min(in.available(), left);
+  }
+
+  // it's okay to mark even if mark isn't supported, as reset won't work
+  @Override
+  public synchronized void mark(int readLimit) {
+    in.mark(readLimit);
+    mark = left;
+  }
+
+  @Override
+  public int read() throws IOException {
+    if (left == 0) {
+      return -1;
+    }
+
+    int result = in.read();
+    if (result != -1) {
+      --left;
+    }
+    return result;
+  }
+
+  @Override
+  public int read(byte[] b, int off, int len) throws IOException {
+    if (left == 0) {
+      return -1;
+    }
+
+    len = (int) Math.min(len, left);
+    int result = in.read(b, off, len);
+    if (result != -1) {
+      left -= result;
+    }
+    return result;
+  }
+
+  @Override
+  public synchronized void reset() throws IOException {
+    if (!in.markSupported()) {
+      throw new IOException("Mark not supported");
+    }
+    if (mark == -1) {
+      throw new IOException("Mark not set");
+    }
+
+    in.reset();
+    left = mark;
+  }
+
+  @Override
+  public long skip(long n) throws IOException {
+    n = Math.min(n, left);
+    long skipped = in.skip(n);
+    left -= skipped;
+    return skipped;
+  }
+}

hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/EncodedDataBlock.java

@@ -33,10 +33,10 @@ import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
 import org.apache.hadoop.hbase.io.hfile.HFileContext;
 import org.apache.hadoop.hbase.util.ByteBufferUtils;
 import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.io.compress.Compressor;
 
 import com.google.common.base.Preconditions;
-import com.google.common.io.NullOutputStream;
 
 /**
  * Encapsulates a data block compressed using a particular encoding algorithm.
@@ -161,7 +161,7 @@ public class EncodedDataBlock {
   public static int getCompressedSize(Algorithm algo, Compressor compressor,
       byte[] inputBuffer, int offset, int length) throws IOException {
     DataOutputStream compressedStream = new DataOutputStream(
-        new NullOutputStream());
+        new IOUtils.NullOutputStream());
     if (compressor != null) {
       compressor.reset();
     }

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/FixedFileTrailer.java

@@ -36,8 +36,6 @@ import org.apache.hadoop.hbase.io.compress.Compression;
 import org.apache.hadoop.hbase.protobuf.generated.HFileProtos;
 import org.apache.hadoop.hbase.util.Bytes;
 
-import com.google.common.io.NullOutputStream;
-
 /**
  * The {@link HFile} has a fixed trailer which contains offsets to other
  * variable parts of the file. Also includes basic metadata on this file. The

hbase-server/src/main/java/org/apache/hadoop/hbase/metrics/ExactCounterMetric.java

@@ -21,9 +21,9 @@ package org.apache.hadoop.hbase.metrics;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
-import java.util.Map;
 import java.util.Map.Entry;
-import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
@@ -33,9 +33,7 @@ import org.apache.hadoop.metrics.util.MetricsBase;
 import org.apache.hadoop.metrics.util.MetricsRegistry;
 import org.cliffc.high_scale_lib.Counter;
 
-import com.google.common.base.Function;
 import com.google.common.collect.Lists;
-import com.google.common.collect.MapMaker;
 
 @Deprecated
 public class ExactCounterMetric extends MetricsBase {
@@ -44,34 +42,25 @@ public class ExactCounterMetric extends MetricsBase {
 
   // only publish stats on the topN items (default to DEFAULT_TOP_N)
   private final int topN;
-  private final Map<String, Counter> counts;
+  private final ConcurrentMap<String, Counter> counts = new ConcurrentHashMap<String, Counter>();
 
   // all access to the 'counts' map should use this lock.
   // take a write lock iff you want to guarantee exclusive access
   // (the map stripes locks internally, so it's already thread safe -
   // this lock is just so you can take a consistent snapshot of data)
   private final ReadWriteLock lock;
-  
-  
-  /**
-   * Constructor to create a new counter metric
-   * @param nam         the name to publish this metric under
-   * @param registry    where the metrics object will be registered
-   * @param description metrics description
-   * @param topN        how many 'keys' to publish metrics on 
-   */
+
+    /**
+     * Constructor to create a new counter metric
+     * @param nam         the name to publish this metric under
+     * @param registry    where the metrics object will be registered
+     * @param description metrics description
+     * @param topN        how many 'keys' to publish metrics on
+     */
   public ExactCounterMetric(final String nam, final MetricsRegistry registry, 
       final String description, int topN) {
     super(nam, description);
 
-    this.counts = new MapMaker().makeComputingMap(
-        new Function<String, Counter>() {
-          @Override
-          public Counter apply(String input) {
-            return new Counter();
-          }    
-        });
-
     this.lock = new ReentrantReadWriteLock();
     this.topN = topN;
 
@@ -89,11 +78,22 @@ public class ExactCounterMetric extends MetricsBase {
     this(nam, registry, NO_DESCRIPTION, DEFAULT_TOP_N);
   }
 
-  
+  /**
+   * Relies on an external lock on {@link #lock} for thread safety.
+   */
+  private Counter getOrCreateCounter(String type){
+    Counter cnt = counts.get(type);
+    if (cnt == null){
+      cnt = new Counter();
+      counts.put(type, cnt);
+    }
+    return cnt;
+  }
+
   public void update(String type) {
     this.lock.readLock().lock();
     try {
-      this.counts.get(type).increment();
+      getOrCreateCounter(type).increment();
     } finally {
       this.lock.readLock().unlock();
     }
@@ -102,7 +102,7 @@ public class ExactCounterMetric extends MetricsBase {
   public void update(String type, long count) {
     this.lock.readLock().lock();
     try {
-      this.counts.get(type).add(count);
+      getOrCreateCounter(type).add(count);
     } finally {
       this.lock.readLock().unlock();
     }

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java

@@ -30,12 +30,12 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.hbase.codec.Codec;
+import org.apache.hadoop.hbase.io.LimitInputStream;
 import org.apache.hadoop.hbase.protobuf.generated.WALProtos;
 import org.apache.hadoop.hbase.protobuf.generated.WALProtos.WALKey;
 import org.apache.hadoop.hbase.protobuf.generated.WALProtos.WALTrailer;
 import org.apache.hadoop.hbase.util.Bytes;
 
-import com.google.common.io.LimitInputStream;
 import com.google.protobuf.CodedInputStream;
 import com.google.protobuf.InvalidProtocolBufferException;