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@@ -32,51 +32,39 @@ import javax.servlet.http.HttpServletRequest;
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import javax.servlet.jsp.JspWriter;
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import org.apache.hadoop.conf.Configuration;
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+import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hdfs.DFSClient;
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-import org.apache.hadoop.hdfs.protocol.DatanodeID;
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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import org.apache.hadoop.hdfs.protocol.LocatedBlock;
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import org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction;
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import org.apache.hadoop.hdfs.server.common.HdfsConstants;
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import org.apache.hadoop.hdfs.server.common.UpgradeStatusReport;
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-import org.apache.hadoop.hdfs.server.datanode.DataNode;
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-import org.apache.hadoop.fs.Path;
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-import org.apache.hadoop.util.StringUtils;
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import org.apache.hadoop.net.NetUtils;
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-import org.apache.hadoop.security.*;
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+import org.apache.hadoop.security.UnixUserGroupInformation;
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+import org.apache.hadoop.util.StringUtils;
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+import org.apache.hadoop.util.VersionInfo;
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public class JspHelper {
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final static public String WEB_UGI_PROPERTY_NAME = "dfs.web.ugi";
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- static FSNamesystem fsn = null;
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- public static InetSocketAddress nameNodeAddr;
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public static final Configuration conf = new Configuration();
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public static final UnixUserGroupInformation webUGI
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= UnixUserGroupInformation.createImmutable(
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conf.getStrings(WEB_UGI_PROPERTY_NAME));
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- public static final int defaultChunkSizeToView =
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+ private static final int defaultChunkSizeToView =
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conf.getInt("dfs.default.chunk.view.size", 32 * 1024);
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- static Random rand = new Random();
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-
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- public JspHelper() {
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- if (DataNode.getDataNode() != null) {
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- nameNodeAddr = DataNode.getDataNode().getNameNodeAddr();
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- }
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- else {
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- fsn = FSNamesystem.getFSNamesystem();
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- nameNodeAddr = fsn.getDFSNameNodeAddress();
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- }
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+ static final Random rand = new Random();
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+ static {
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UnixUserGroupInformation.saveToConf(conf,
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UnixUserGroupInformation.UGI_PROPERTY_NAME, webUGI);
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}
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- public DatanodeID randomNode() throws IOException {
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- return fsn.getRandomDatanode();
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- }
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+ /** Private constructor for preventing creating JspHelper object. */
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+ private JspHelper() {}
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- public DatanodeInfo bestNode(LocatedBlock blk) throws IOException {
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+ public static DatanodeInfo bestNode(LocatedBlock blk) throws IOException {
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TreeSet<DatanodeInfo> deadNodes = new TreeSet<DatanodeInfo>();
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DatanodeInfo chosenNode = null;
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int failures = 0;
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@@ -115,7 +103,8 @@ public class JspHelper {
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s.close();
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return chosenNode;
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}
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- public void streamBlockInAscii(InetSocketAddress addr, long blockId,
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+
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+ public static void streamBlockInAscii(InetSocketAddress addr, long blockId,
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long genStamp, long blockSize,
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long offsetIntoBlock, long chunkSizeToView, JspWriter out)
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throws IOException {
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@@ -155,24 +144,20 @@ public class JspHelper {
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s.close();
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out.print(new String(buf));
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}
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- public void DFSNodesStatus(ArrayList<DatanodeDescriptor> live,
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- ArrayList<DatanodeDescriptor> dead) {
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- if (fsn != null)
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- fsn.DFSNodesStatus(live, dead);
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- }
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- public void addTableHeader(JspWriter out) throws IOException {
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+
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+ public static void addTableHeader(JspWriter out) throws IOException {
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out.print("<table border=\"1\""+
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" cellpadding=\"2\" cellspacing=\"2\">");
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out.print("<tbody>");
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}
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- public void addTableRow(JspWriter out, String[] columns) throws IOException {
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+ public static void addTableRow(JspWriter out, String[] columns) throws IOException {
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out.print("<tr>");
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for (int i = 0; i < columns.length; i++) {
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out.print("<td style=\"vertical-align: top;\"><B>"+columns[i]+"</B><br></td>");
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}
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out.print("</tr>");
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}
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- public void addTableRow(JspWriter out, String[] columns, int row) throws IOException {
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+ public static void addTableRow(JspWriter out, String[] columns, int row) throws IOException {
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out.print("<tr>");
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for (int i = 0; i < columns.length; i++) {
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@@ -185,17 +170,17 @@ public class JspHelper {
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}
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out.print("</tr>");
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}
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- public void addTableFooter(JspWriter out) throws IOException {
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+ public static void addTableFooter(JspWriter out) throws IOException {
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out.print("</tbody></table>");
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}
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- public String getSafeModeText() {
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+ public static String getSafeModeText(FSNamesystem fsn) {
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if (!fsn.isInSafeMode())
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return "";
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return "Safe mode is ON. <em>" + fsn.getSafeModeTip() + "</em><br>";
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}
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- public String getInodeLimitText() {
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+ public static String getInodeLimitText(FSNamesystem fsn) {
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long inodes = fsn.dir.totalInodes();
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long blocks = fsn.getBlocksTotal();
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long maxobjects = fsn.getMaxObjects();
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@@ -217,7 +202,7 @@ public class JspHelper {
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return str;
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}
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- public String getUpgradeStatusText() {
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+ public static String getUpgradeStatusText(FSNamesystem fsn) {
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String statusText = "";
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try {
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UpgradeStatusReport status =
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@@ -231,7 +216,7 @@ public class JspHelper {
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return statusText;
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}
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- public void sortNodeList(ArrayList<DatanodeDescriptor> nodes,
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+ public static void sortNodeList(ArrayList<DatanodeDescriptor> nodes,
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String field, String order) {
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class NodeComapare implements Comparator<DatanodeDescriptor> {
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@@ -370,4 +355,20 @@ public class JspHelper {
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file = "..." + file.substring(start, file.length());
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out.print("<title>HDFS:" + file + "</title>");
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}
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+
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+ /** Convert a String to chunk-size-to-view. */
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+ public static int string2ChunkSizeToView(String s) {
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+ int n = s == null? 0: Integer.parseInt(s);
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+ return n > 0? n: defaultChunkSizeToView;
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+ }
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+
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+ /** Return a table containing version information. */
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+ public static String getVersionTable(FSNamesystem fsn) {
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+ return "<div id='dfstable'><table>"
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+ + "\n <tr><td id='col1'>Started:</td><td>" + fsn.getStartTime() + "</td></tr>\n"
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+ + "\n <tr><td id='col1'>Version:</td><td>" + VersionInfo.getVersion() + ", " + VersionInfo.getRevision()
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+ + "\n <tr><td id='col1'>Compiled:</td><td>" + VersionInfo.getDate() + " by " + VersionInfo.getUser() + " from " + VersionInfo.getBranch()
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+ + "\n <tr><td id='col1'>Upgrades:</td><td>" + getUpgradeStatusText(fsn)
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+ + "\n</table></div>";
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+ }
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}
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Tsz-wo Sze