Merge pull request #67 from groupby/f/fixHeaders2

make headers thread safe

Author: Amir Behnam

src/main/java/com/groupbyinc/api/AbstractBridge.java

@@ -73,7 +73,7 @@ public abstract class AbstractBridge {
   private CloseableHttpClient httpClient;
   private long retryTimeout = DEFAULT_RETRY_TIMEOUT;
   private long maxTries = DEFAULT_MAX_TRIES;
-  private List<Header> headers = new ArrayList<Header>();
+  private volatile List<Header> headers = new ArrayList<Header>();
 
   /**
    * <code>

src/main/java/com/groupbyinc/api/CloudBridge.java

@@ -73,7 +73,7 @@ public CloudBridge(String clientKey, String customerId, ConnectionConfiguration
    *
    * @internal
    */
-  public void setCachingEnabled(boolean cachingEnabled) {
+  public synchronized void  setCachingEnabled(boolean cachingEnabled) {
     if (containsSkipCachingHeader()) {
       if (cachingEnabled) {
         removeSkipCachingHeader();