Added support for setting thread affinity using a description, closes #54

Author: peter-lawrey

affinity/src/main/java/net/openhft/affinity/AffinityLock.java

@@ -312,7 +312,7 @@ public void bind(boolean wholeCore) {
         } else if (cpuId >= 0) {
             bound = true;
             assignedThread = Thread.currentThread();
-            LOGGER.info("Assigning cpu {} to {}", cpuId, assignedThread);
+            LOGGER.info("Assigning cpu {} to {} on thread id {}", cpuId, assignedThread, Affinity.getThreadId());
         }
         if (cpuId >= 0) {
             BitSet affinity = new BitSet();

affinity/src/main/java/net/openhft/affinity/lockchecker/FileLockBasedLockChecker.java

@@ -137,7 +137,7 @@ public String getMetaInfo(int id) throws IOException {
         FileChannel fc = lr.channel;
         ByteBuffer buffer = ByteBuffer.allocate(64);
         int len = fc.read(buffer, 0);
-        String content = new String(buffer.array(), 0, len);
+        String content = len < 1 ? "" : new String(buffer.array(), 0, len);
         if (content.isEmpty()) {
             LOGGER.warn("Empty lock file {}", file.getAbsolutePath());
             return null;