Update buckd consoles.

Summary:
Parsers and FileHashCaches are reused by multiple commands,
so need to have their consoles updated on each command so that they
can log to the current console.

Test Plan:
0) buck test --all
1) buckd
2) buck build -v 8 buck &> /dev/null
3) touch tmp
4) buck build -v 8 buck 2>&1 | head
5) check that 4 prints "Parser watched event ENTRY_MODIFY ... tmp"

src/com/facebook/buck/cli/Main.java

diff --git a/src/com/facebook/buck/cli/Main.java b/src/com/facebook/buck/cli/Main.java
index 3744688..1ce2d46 100644
--- a/src/com/facebook/buck/cli/Main.java
+++ b/src/com/facebook/buck/cli/Main.java
@@ -110,6 +110,7 @@
   private final class Daemon implements Closeable {
 
     private final Parser parser;
+    private final DefaultFileHashCache hashCache;
     private final EventBus fileEventBus;
     private final ProjectFilesystemWatcher filesystemWatcher;
     private final BuckConfig config;
@@ -121,7 +122,7 @@
                   Console console) throws IOException {
       this.config = Preconditions.checkNotNull(config);
       this.console = Preconditions.checkNotNull(console);
-      DefaultFileHashCache hashCache = new DefaultFileHashCache(projectFilesystem, console);
+      this.hashCache = new DefaultFileHashCache(projectFilesystem, console);
       this.parser = new Parser(projectFilesystem,
           new KnownBuildRuleTypes(),
           console,
@@ -187,13 +188,15 @@
       });
     }
 
-    private void watchFileSystem() throws IOException {
+    private void watchFileSystem(Console console) throws IOException {
 
       // Synchronize on parser object so that all outstanding watch events are processed
       // as a single, atomic Parser cache update and are not interleaved with Parser cache
       // invalidations triggered by requests to parse build files or interrupted by client
       // disconnections.
       synchronized (parser) {
+        parser.setConsole(console);
+        hashCache.setConsole(console);
         filesystemWatcher.postEvents();
       }
     }
@@ -336,7 +339,7 @@
     if (context.isPresent()) {
       Daemon daemon = getDaemon(projectFilesystem, config, console);
       daemon.watchClient(context.get());
-      daemon.watchFileSystem();
+      daemon.watchFileSystem(console);
       daemon.initWebServer();
       parser = daemon.getParser();
     } else {

src/com/facebook/buck/parser/Parser.java

diff --git a/src/com/facebook/buck/parser/Parser.java b/src/com/facebook/buck/parser/Parser.java
index c68c2b9..97c8f0b 100644
--- a/src/com/facebook/buck/parser/Parser.java
+++ b/src/com/facebook/buck/parser/Parser.java
@@ -109,7 +109,7 @@
   private final KnownBuildRuleTypes buildRuleTypes;
   private final ProjectBuildFileParserFactory buildFileParserFactory;
   private final RuleKeyBuilderFactory ruleKeyBuilderFactory;
-  private final Console console;
+  private Console console;
 
   /**
    * Key of the meta-rule that lists the build files executed while reading rules.
@@ -125,6 +125,14 @@
   private final ListMultimap<Path, Path> buildFileDependents;
 
   /**
+   * Parsers may be reused on different consoles, so need to allow the console to be set.
+   * @param console The new console that the Parser should use.
+   */
+  public synchronized void setConsole(Console console) {
+    this.console = console;
+  }
+
+  /**
    * A cached BuildFileTree which can be invalidated and lazily constructs new BuildFileTrees.
    * TODO(user): refactor this as a generic CachingSupplier<T> when it's needed elsewhere.
    */

src/com/facebook/buck/util/DefaultFileHashCache.java

diff --git a/src/com/facebook/buck/util/DefaultFileHashCache.java b/src/com/facebook/buck/util/DefaultFileHashCache.java
index 9032b84..f2d6509 100644
--- a/src/com/facebook/buck/util/DefaultFileHashCache.java
+++ b/src/com/facebook/buck/util/DefaultFileHashCache.java
@@ -38,7 +38,7 @@
 public class DefaultFileHashCache implements FileHashCache {
 
   private final ProjectFilesystem projectFilesystem;
-  private final Console console;
+  private Console console;
 
   @VisibleForTesting
   final LoadingCache<Path, HashCode> loadingCache;
@@ -83,9 +83,9 @@
    * build rules if required.
    */
   @Subscribe
-  public void onFileSystemChange(WatchEvent<?> event) throws IOException {
+  public synchronized void onFileSystemChange(WatchEvent<?> event) throws IOException {
     if (console.getVerbosity() == Verbosity.ALL) {
-      console.getStdErr().printf("ConcurrentMapFileHashCache watched event %s %s\n", event.kind(),
+      console.getStdErr().printf("DefaultFileHashCache watched event %s %s\n", event.kind(),
           projectFilesystem.createContextString(event));
     }
 
@@ -98,4 +98,12 @@
       loadingCache.invalidateAll();
     }
   }
+
+  /**
+   * DefaultFileHashCaches may be reused on different consoles, so allow the console to be set.
+   * @param console The new console that the Parser should use.
+   */
+  public synchronized void setConsole(Console console) {
+    this.console = console;
+  }
 }