--- /dev/null
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.cms.ui.workbench.useradmin;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.argeo.node.ArgeoLogListener;
+import org.eclipse.jface.viewers.ILazyContentProvider;
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.swt.widgets.Table;
+import org.eclipse.swt.widgets.TableItem;
+
+/** A content provider maintaining an array of lines */
+class LogContentProvider implements ILazyContentProvider, ArgeoLogListener {
+ private static final long serialVersionUID = -2084872367738339721L;
+
+ private DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
+
+ private final Long start;
+ /** current - start = line number. first line is number '1' */
+ private Long current;
+
+ // TODO make it configurable
+ private final Integer maxLineBufferSize = 10 * 1000;
+
+ private final TableViewer viewer;
+ private LinkedList<LogLine> lines;
+
+ public LogContentProvider(TableViewer viewer) {
+ this.viewer = viewer;
+ start = System.currentTimeMillis();
+ lines = new LinkedList<LogLine>();
+ current = start;
+ }
+
+ public synchronized void dispose() {
+ lines.clear();
+ lines = null;
+ }
+
+ @SuppressWarnings("unchecked")
+ public synchronized void inputChanged(Viewer viewer, Object oldInput,
+ Object newInput) {
+ List<String> lin = (List<String>) newInput;
+ if (lin == null)
+ return;
+ for (String line : lin) {
+ addLine(line);
+ }
+ this.viewer.setItemCount(lines.size());
+ }
+
+ public void updateElement(int index) {
+ viewer.replace(lines.get(index), index);
+ }
+
+ public synchronized void appendLog(String username, Long timestamp,
+ String level, String category, String thread, Object msg,
+ String[] exception) {
+ // check if valid
+ if (lines == null)
+ return;
+
+ String message = msg.toString();
+ int count = 0;
+ String prefix = prefix(username, timestamp, level, category, thread)
+ .toString();
+ // String suffix = suffix(username, timestamp, level, category, thread);
+ for (String line : message.split("\n")) {
+ addLine(count == 0 ? prefix + line : line);
+ count++;
+ }
+
+ if (exception != null) {
+ for (String ste : exception) {
+ addLine(ste);
+ }
+ }
+
+ viewer.getTable().getDisplay().asyncExec(new Runnable() {
+ public void run() {
+ if (lines == null)
+ return;
+ viewer.setItemCount(lines.size());
+ // doesn't work with syncExec
+ scrollToLastLine();
+ }
+ });
+ }
+
+ protected StringBuffer prefix(String username, Long timestamp,
+ String level, String category, String thread) {
+ StringBuffer buf = new StringBuffer("");
+ buf.append(dateFormat.format(new Date(timestamp))).append(" ");
+ // buf.append(level).append(" ");
+ return buf;
+ }
+
+ /** Normalize string to the given size */
+ protected String norm(String str, Integer size) {
+ int length = str.length();
+ if (length == size)
+ return str;
+ else if (length > size)
+ return str.substring(0, size);
+ else {
+ char[] arr = new char[size - length];
+ Arrays.fill(arr, ' ');
+ return str + new String(arr);
+ }
+ }
+
+ // protected String suffix(String username, Long timestamp, String level,
+ // String category, String thread) {
+ // return "";
+ // }
+
+ /** Scroll to the last line */
+ protected synchronized void scrollToLastLine() {
+ // we try to show last line with two methods
+ // viewer.reveal(lines.peekLast());
+
+ Table table = viewer.getTable();
+ TableItem ti = table.getItem(table.getItemCount() - 1);
+ table.showItem(ti);
+ }
+
+ protected synchronized LogLine addLine(String line) {
+ // check for maximal size and purge if necessary
+ while (lines.size() >= maxLineBufferSize) {
+ for (int i = 0; i < maxLineBufferSize / 10; i++) {
+ lines.poll();
+ }
+ }
+
+ current++;
+ LogLine logLine = new LogLine(current, line);
+ lines.add(logLine);
+ return logLine;
+ }
+
+ private class LogLine {
+ private Long linenumber;
+ private String message;
+
+ public LogLine(Long linenumber, String message) {
+ this.linenumber = linenumber;
+ this.message = message;
+ }
+
+ @Override
+ public int hashCode() {
+ return linenumber.intValue();
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj instanceof LogLine)
+ return ((LogLine) obj).linenumber.equals(linenumber);
+ else
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return message;
+ }
+
+ }
+}
\ No newline at end of file
projects / lgpl / argeo-commons.git / blobdiff