Fix a couple of minor FindBugs warnings

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc8.0.x/trunk@1804310 13f79535-47bb-0310-9956-ffa450edef68

webapps/examples/WEB-INF/classes/compressionFilters/CompressionFilter.java

@@ -50,17 +50,18 @@ public class CompressionFilter implements Filter {
     /**
      * Minimal reasonable threshold.
      */
-    private final int minThreshold = 128;
+    private static final int MIN_THRESHOLD = 128;
 
     /**
-     * The threshold number to compress.
+     * Minimal reasonable buffer.
      */
-    protected int compressionThreshold = 0;
+    // 8KB is what tomcat would use by default anyway
+    private static final int MIN_BUFFER = 8192;
 
     /**
-     * Minimal reasonable buffer.
+     * The threshold number to compress.
      */
-    private final int minBuffer = 8192;  // 8KB is what tomcat would use by default anyway
+    protected int compressionThreshold = 0;
 
     /**
      * The compression buffer size to avoid chunking.
@@ -95,24 +96,24 @@ public void init(FilterConfig filterConfig) {
             String str = filterConfig.getInitParameter("compressionThreshold");
             if (str!=null) {
                 compressionThreshold = Integer.parseInt(str);
-                if (compressionThreshold != 0 && compressionThreshold < minThreshold) {
+                if (compressionThreshold != 0 && compressionThreshold < MIN_THRESHOLD) {
                     if (debug > 0) {
-                        System.out.println("compressionThreshold should be either 0 - no compression or >= " + minThreshold);
-                        System.out.println("compressionThreshold set to " + minThreshold);
+                        System.out.println("compressionThreshold should be either 0 - no compression or >= " + MIN_THRESHOLD);
+                        System.out.println("compressionThreshold set to " + MIN_THRESHOLD);
                     }
-                    compressionThreshold = minThreshold;
+                    compressionThreshold = MIN_THRESHOLD;
                 }
             }
 
             str = filterConfig.getInitParameter("compressionBuffer");
             if (str!=null) {
                 compressionBuffer = Integer.parseInt(str);
-                if (compressionBuffer < minBuffer) {
+                if (compressionBuffer < MIN_BUFFER) {
                     if (debug > 0) {
-                        System.out.println("compressionBuffer should be >= " + minBuffer);
-                        System.out.println("compressionBuffer set to " + minBuffer);
+                        System.out.println("compressionBuffer should be >= " + MIN_BUFFER);
+                        System.out.println("compressionBuffer set to " + MIN_BUFFER);
                     }
-                    compressionBuffer = minBuffer;
+                    compressionBuffer = MIN_BUFFER;
                 }
             }