Author: todd
Date: Tue Jul 3 20:55:29 2012
New Revision: 1356939
URL: http://svn.apache.org/viewvc?rev=1356939&view=rev
Log:
HDFS-3574. Fix small race and do some cleanup in GetImageServlet. Contributed
by Todd Lipcon.
Modified:
hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ServletUtil.java
Modified:
hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ServletUtil.java
URL:
http://svn.apache.org/viewvc/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ServletUtil.java?rev=1356939&r1=1356938&r2=1356939&view=diff
==============================================================================
---
hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ServletUtil.java
(original)
+++
hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ServletUtil.java
Tue Jul 3 20:55:29 2012
@@ -60,6 +60,20 @@ public class ServletUtil {
s = s.trim();
return s.length() == 0? null: s;
}
+
+ /**
+ * @return a long value as passed in the given parameter, throwing
+ * an exception if it is not present or if it is not a valid number.
+ */
+ public static long parseLongParam(ServletRequest request, String param)
+ throws IOException {
+ String paramStr = request.getParameter(param);
+ if (paramStr == null) {
+ throw new IOException("Invalid request has no " + param + " parameter");
+ }
+
+ return Long.valueOf(paramStr);
+ }
public static final String HTML_TAIL = "<hr />\n"
+ "<a href='http://hadoop.apache.org/core'>Hadoop</a>, "
