part one of pull request #92:

Parse key=values even with whitespace around the equals sign.
Prevent ArrayOutOfBounds exception.

src/main/java/org/graylog2/filters/TokenizerFilter.java

@@ -22,15 +22,15 @@
 
 import com.yammer.metrics.Metrics;
 import com.yammer.metrics.core.TimerContext;
-import java.util.concurrent.TimeUnit;
-import java.util.regex.Pattern;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.log4j.Logger;
-import org.graylog2.logmessage.LogMessageImpl;
 import org.graylog2.plugin.GraylogServer;
 import org.graylog2.plugin.filters.MessageFilter;
 import org.graylog2.plugin.logmessage.LogMessage;
 
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Pattern;
+
 /**
  * @author Lennart Koopmann <[email protected]>
  */
@@ -60,12 +60,13 @@ public void filter(LogMessage msg, GraylogServer server) {
         int extracted = 0;
         if (msg.getShortMessage().contains("=")) {
             try {
-                String[] parts = msg.getShortMessage().split(" ");
+                String nmsg = msg.getShortMessage().replaceAll("\\s?=\\s?", "=");
+                String[] parts = nmsg.split(" ");
                 if (parts != null) {
                     for (String part : parts) {
                         if (part.contains("=") && StringUtils.countMatches(part, "=") == 1) {
                             String[] kv = part.split("=");
-                            if (kv[0] != null && kv[1] != null && p.matcher(kv[0]).matches() && !msg.getAdditionalData().containsKey("_" + kv[0])) {
+                            if (kv.length == 2 && p.matcher(kv[0]).matches() && !msg.getAdditionalData().containsKey("_" + kv[0])) {
                                 msg.addAdditionalData(kv[0].trim(), kv[1].trim());
                                 extracted++;
                             }