Use ConcurrentNavigableMap

[controller.git] / third-party / atomix / storage / src / main / java / io / atomix / storage / journal / SegmentedJournal.java

diff --git a/third-party/atomix/storage/src/main/java/io/atomix/storage/journal/SegmentedJournal.java b/third-party/atomix/storage/src/main/java/io/atomix/storage/journal/SegmentedJournal.java
index 74923f602614ce72f2d694d26aab6108a4ef9148..a452587b7691247aacd193fa220b575cd9ba560f 100644 (file)
--- a/third-party/atomix/storage/src/main/java/io/atomix/storage/journal/SegmentedJournal.java
+++ b/third-party/atomix/storage/src/main/java/io/atomix/storage/journal/SegmentedJournal.java
@@ -24,26 +24,24 @@ import java.nio.file.StandardOpenOption;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.Map;
-import java.util.NavigableMap;
 import java.util.SortedMap;
 import java.util.TreeMap;
+import java.util.concurrent.ConcurrentNavigableMap;
 import java.util.concurrent.ConcurrentSkipListMap;
 
 import com.google.common.collect.Sets;
-import io.atomix.storage.StorageException;
-import io.atomix.storage.StorageLevel;
 import io.atomix.utils.serializer.Namespace;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import static com.google.common.base.Preconditions.checkArgument;
-import static com.google.common.base.Preconditions.checkNotNull;
 import static com.google.common.base.Preconditions.checkState;
+import static java.util.Objects.requireNonNull;
 
 /**
  * Segmented journal.
  */
-public class SegmentedJournal<E> implements Journal<E> {
+public final class SegmentedJournal<E> implements Journal<E> {
 
   /**
    * Returns a new Raft log builder.
@@ -69,7 +67,7 @@ public class SegmentedJournal<E> implements Journal<E> {
   private final SegmentedJournalWriter<E> writer;
   private volatile long commitIndex;
 
-  private final NavigableMap<Long, JournalSegment<E>> segments = new ConcurrentSkipListMap<>();
+  private final ConcurrentNavigableMap<Long, JournalSegment<E>> segments = new ConcurrentSkipListMap<>();
   private final Collection<SegmentedJournalReader<E>> readers = Sets.newConcurrentHashSet();
   private JournalSegment<E> currentSegment;
 
@@ -85,10 +83,10 @@ public class SegmentedJournal<E> implements Journal<E> {
       int maxEntriesPerSegment,
       double indexDensity,
       boolean flushOnCommit) {
-    this.name = checkNotNull(name, "name cannot be null");
-    this.storageLevel = checkNotNull(storageLevel, "storageLevel cannot be null");
-    this.directory = checkNotNull(directory, "directory cannot be null");
-    this.namespace = checkNotNull(namespace, "namespace cannot be null");
+    this.name = requireNonNull(name, "name cannot be null");
+    this.storageLevel = requireNonNull(storageLevel, "storageLevel cannot be null");
+    this.directory = requireNonNull(directory, "directory cannot be null");
+    this.namespace = requireNonNull(namespace, "namespace cannot be null");
     this.maxSegmentSize = maxSegmentSize;
     this.maxEntrySize = maxEntrySize;
     this.maxEntriesPerSegment = maxEntriesPerSegment;
@@ -232,7 +230,7 @@ public class SegmentedJournal<E> implements Journal<E> {
   /**
    * Opens the segments.
    */
-  private void open() {
+  private synchronized void open() {
     // Load existing log segments from disk.
     for (JournalSegment<E> segment : loadSegments()) {
       segments.put(segment.descriptor().index(), segment);
@@ -667,7 +665,7 @@ public class SegmentedJournal<E> implements Journal<E> {
   /**
    * Raft log builder.
    */
-  public static class Builder<E> implements io.atomix.utils.Builder<SegmentedJournal<E>> {
+  public static final class Builder<E> {
     private static final boolean DEFAULT_FLUSH_ON_COMMIT = false;
     private static final String DEFAULT_NAME = "atomix";
     private static final String DEFAULT_DIRECTORY = System.getProperty("user.dir");
@@ -675,17 +673,15 @@ public class SegmentedJournal<E> implements Journal<E> {
     private static final int DEFAULT_MAX_ENTRY_SIZE = 1024 * 1024;
     private static final int DEFAULT_MAX_ENTRIES_PER_SEGMENT = 1024 * 1024;
     private static final double DEFAULT_INDEX_DENSITY = .005;
-    private static final int DEFAULT_CACHE_SIZE = 1024;
-
-    protected String name = DEFAULT_NAME;
-    protected StorageLevel storageLevel = StorageLevel.DISK;
-    protected File directory = new File(DEFAULT_DIRECTORY);
-    protected Namespace namespace;
-    protected int maxSegmentSize = DEFAULT_MAX_SEGMENT_SIZE;
-    protected int maxEntrySize = DEFAULT_MAX_ENTRY_SIZE;
-    protected int maxEntriesPerSegment = DEFAULT_MAX_ENTRIES_PER_SEGMENT;
-    protected double indexDensity = DEFAULT_INDEX_DENSITY;
-    protected int cacheSize = DEFAULT_CACHE_SIZE;
+
+    private String name = DEFAULT_NAME;
+    private StorageLevel storageLevel = StorageLevel.DISK;
+    private File directory = new File(DEFAULT_DIRECTORY);
+    private Namespace namespace;
+    private int maxSegmentSize = DEFAULT_MAX_SEGMENT_SIZE;
+    private int maxEntrySize = DEFAULT_MAX_ENTRY_SIZE;
+    private int maxEntriesPerSegment = DEFAULT_MAX_ENTRIES_PER_SEGMENT;
+    private double indexDensity = DEFAULT_INDEX_DENSITY;
     private boolean flushOnCommit = DEFAULT_FLUSH_ON_COMMIT;
 
     protected Builder() {
@@ -698,7 +694,7 @@ public class SegmentedJournal<E> implements Journal<E> {
      * @return The storage builder.
      */
     public Builder<E> withName(String name) {
-      this.name = checkNotNull(name, "name cannot be null");
+      this.name = requireNonNull(name, "name cannot be null");
       return this;
     }
 
@@ -711,7 +707,7 @@ public class SegmentedJournal<E> implements Journal<E> {
      * @return The storage builder.
      */
     public Builder<E> withStorageLevel(StorageLevel storageLevel) {
-      this.storageLevel = checkNotNull(storageLevel, "storageLevel cannot be null");
+      this.storageLevel = requireNonNull(storageLevel, "storageLevel cannot be null");
       return this;
     }
 
@@ -725,7 +721,7 @@ public class SegmentedJournal<E> implements Journal<E> {
      * @throws NullPointerException If the {@code directory} is {@code null}
      */
     public Builder<E> withDirectory(String directory) {
-      return withDirectory(new File(checkNotNull(directory, "directory cannot be null")));
+      return withDirectory(new File(requireNonNull(directory, "directory cannot be null")));
     }
 
     /**
@@ -738,7 +734,7 @@ public class SegmentedJournal<E> implements Journal<E> {
      * @throws NullPointerException If the {@code directory} is {@code null}
      */
     public Builder<E> withDirectory(File directory) {
-      this.directory = checkNotNull(directory, "directory cannot be null");
+      this.directory = requireNonNull(directory, "directory cannot be null");
       return this;
     }
 
@@ -749,7 +745,7 @@ public class SegmentedJournal<E> implements Journal<E> {
      * @return The journal builder.
      */
     public Builder<E> withNamespace(Namespace namespace) {
-      this.namespace = checkNotNull(namespace, "namespace cannot be null");
+      this.namespace = requireNonNull(namespace, "namespace cannot be null");
       return this;
     }
 
@@ -836,7 +832,6 @@ public class SegmentedJournal<E> implements Journal<E> {
     @Deprecated
     public Builder<E> withCacheSize(int cacheSize) {
       checkArgument(cacheSize >= 0, "cacheSize must be positive");
-      this.cacheSize = cacheSize;
       return this;
     }
 
@@ -868,7 +863,11 @@ public class SegmentedJournal<E> implements Journal<E> {
       return this;
     }
 
-    @Override
+    /**
+     * Build the {@link SegmentedJournal}.
+     *
+     * @return A new {@link SegmentedJournal}.
+     */
     public SegmentedJournal<E> build() {
       return new SegmentedJournal<>(
           name,