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Client library for working with the NATS messaging system.
// Copyright 2023 The NATS Authors
// 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 io.nats.examples.chaosTestApp;
import io.nats.client.support.JsonSerializable;
import io.nats.client.support.JsonValue;
import io.nats.examples.chaosTestApp.support.CommandLine;
import javax.swing.*;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import java.awt.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.locks.ReentrantLock;
public class Output extends JPanel {
public enum Screen {Left, Main, Console}
static final ReentrantLock workLock = new ReentrantLock();
static final ReentrantLock controlLock = new ReentrantLock();
static final ReentrantLock debugLock = new ReentrantLock();
static boolean console;
static boolean work;
static boolean debug;
static boolean started;
static Output workInstance;
static Output controlInstance;
static Output debugInstance;
static PrintStream workLog;
static PrintStream controlLog;
static PrintStream debugLog;
static String controlConsoleAreaLabel = null;
static final int HEIGHT_REDUCTION = 45;
static final Font DISPLAY_FONT;
static final int SCREEN_AVAILABLE_WIDTH;
static final int SCREEN_AVAILABLE_HEIGHT;
static final int ROWS;
JTextArea area;
static {
// figure UI_FONT
String fontName = Font.MONOSPACED;
GraphicsEnvironment localEnv;
localEnv= GraphicsEnvironment.getLocalGraphicsEnvironment();
String allfonts[] = localEnv.getAvailableFontFamilyNames();
for (String allfont : allfonts) {
if (allfont.equals("JetBrains Mono")) {
fontName = allfont;
break;
}
}
DISPLAY_FONT = new Font(fontName, Font.PLAIN, 14);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
SCREEN_AVAILABLE_WIDTH = (int)screenSize.getWidth();
SCREEN_AVAILABLE_HEIGHT = (int)screenSize.getHeight() - HEIGHT_REDUCTION;
ROWS = SCREEN_AVAILABLE_HEIGHT / 21;
}
public static void start(CommandLine cmd) {
if (started) {
return;
}
started = true;
console = cmd.uiScreen == Screen.Console;
work = cmd.work;
debug = cmd.debug;
if (console && (work || debug)) {
controlConsoleAreaLabel = "CTRL";
}
// LOG FILES
if (cmd.logdir != null) {
File f = new File(cmd.logdir);
if (!f.exists() && !f.mkdirs()) {
errorMessage("OUTPUT", "Unable to create logdir: " + cmd.logdir);
System.exit(-1);
}
String template = "applog-which.txt";
try {
String fn = template.replace("which", "control");
Path p = Paths.get(f.getAbsolutePath(), fn);
controlLog = new PrintStream(new FileOutputStream(p.toFile()));
if (debug) {
fn = template.replace("which", "debug");
p = Paths.get(f.getAbsolutePath(), fn);
debugLog = new PrintStream(new FileOutputStream(p.toFile()));
}
if (work) {
fn = template.replace("which", "work");
p = Paths.get(f.getAbsolutePath(), fn);
workLog = new PrintStream(new FileOutputStream(p.toFile()));
}
}
catch (FileNotFoundException e) {
errorMessage("OUTPUT", "Unable to create log file: " + e);
System.exit(-1);
}
}
// SCREEN
int debugWidth = (int)(SCREEN_AVAILABLE_WIDTH * 0.42);
int workWidth = (int)(SCREEN_AVAILABLE_WIDTH * 0.24);
int controlWidth = SCREEN_AVAILABLE_WIDTH - debugWidth - workWidth;
int offset = 0;
if (cmd.uiScreen == Screen.Left) {
if (debug || work) {
if (debug) {
debugInstance = newUi("Debug", -debugWidth, debugWidth, SCREEN_AVAILABLE_HEIGHT);
offset = -debugWidth;
}
if (work) {
offset -= controlWidth;
controlInstance = newUi("Control", offset, controlWidth, SCREEN_AVAILABLE_HEIGHT);
workInstance = newUi("Work", offset - workWidth, workWidth, SCREEN_AVAILABLE_HEIGHT);
}
else {
offset -= debugWidth;
controlInstance = newUi("Control", offset, debugWidth, SCREEN_AVAILABLE_HEIGHT);
}
}
else {
offset = -SCREEN_AVAILABLE_WIDTH / 2;
controlInstance = newUi("Control", offset, -offset, SCREEN_AVAILABLE_HEIGHT);
}
}
else if (cmd.uiScreen == Screen.Main) {
if (debug || work) {
if (debug) {
debugInstance = newUi("Debug", 0, debugWidth, SCREEN_AVAILABLE_HEIGHT);
offset = debugWidth;
}
if (work) {
controlInstance = newUi("Control", offset, controlWidth, SCREEN_AVAILABLE_HEIGHT);
offset += controlWidth;
workInstance = newUi("Work", offset, workWidth, SCREEN_AVAILABLE_HEIGHT);
}
else {
controlInstance = newUi("Control", offset, debugWidth, SCREEN_AVAILABLE_HEIGHT);
}
}
else {
offset = SCREEN_AVAILABLE_WIDTH / 2;
controlInstance = newUi("Control", 0, offset, SCREEN_AVAILABLE_HEIGHT);
}
}
}
private static Output newUi(String name, int xLoc, int width, int height) {
//Create and set up the window.
JFrame frame = new JFrame(name);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add contents to the window.
Output output = new Output();
frame.add(output);
//Display the window.
frame.setLocation(xLoc, 0);
frame.setPreferredSize(new Dimension(width, height));
frame.pack();
frame.setVisible(true);
return output;
}
private Output() {
super(new GridLayout(1, 1));
area = new JTextArea(ROWS, 40);
area.setEditable(false);
area.setFont(DISPLAY_FONT);
add(new JScrollPane(area));
}
private static String time() {
String t = "" + System.currentTimeMillis();
return t.substring(t.length() - 9);
}
public static void workMessage(String label, String s) {
if (work) {
workLock.lock();
try {
if (console) {
consoleMessage("WORK", label, s);
}
else {
append(label, s, workInstance.area);
}
if (workLog != null) {
consoleMessage(null, label, s, workLog);
}
}
finally {
workLock.unlock();
}
}
}
public static void controlMessage(String label, JsonSerializable j) {
controlMessage(label, formatted(j));
}
public static void controlMessage(String label, String jvLabel, JsonValue jv) {
controlMessage(label, formatted(jv).replace("JsonValue", jvLabel));
}
public static void controlMessage(String label, String s) {
controlLock.lock();
try {
if (console) {
consoleMessage(controlConsoleAreaLabel, label, s);
}
else {
append(label, s, controlInstance.area);
}
if (workLog != null) {
consoleMessage(null, label, s, controlLog);
}
}
finally {
controlLock.unlock();
}
}
public static void dumpControl() {
dump("Control", controlInstance.area.getDocument());
}
private static void dump(String label, Document document) {
try {
System.out.println("----------------------------------------------------------------------------------------------------");
System.out.println("UI-" + label);
System.out.println("----------------------------------------------------------------------------------------------------");
System.out.println(document.getText(0, document.getLength()));
System.out.println("----------------------------------------------------------------------------------------------------");
}
catch (BadLocationException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
public static void debugMessage(String label, String s) {
if (debug) {
debugLock.lock();
try {
if (console) {
consoleMessage("DEBUG", label, s);
}
else {
debugInstance.area.append(s);
debugInstance.area.append("\n");
afterAppend(debugInstance.area);
}
if (debugLog != null) {
consoleMessage("DEBUG", label, s + "\n", controlLog);
}
}
finally {
debugLock.unlock();
}
}
}
static final String NLINDENT = "\n ";
private static void append(String label, String s, JTextArea area) {
if (s.contains("\n")) {
String timeLabel = time() + " | " + label;
area.append(timeLabel);
if (!s.startsWith("\n")) {
area.append(" | ");
}
area.append(s.replace("\n", NLINDENT));
}
else {
area.append(time());
area.append(" | ");
area.append(label);
area.append(" | ");
area.append(s);
}
area.append("\n");
afterAppend(area);
}
public static void errorMessage(String label, String s) {
consoleMessage("ERROR", label, s, System.out);
}
public static void fatalMessage(String label, String s) {
consoleMessage("FATAL", label, s, System.out);
}
public static void consoleMessage(String area, String label, String s) {
consoleMessage(area, label, s, System.out);
}
public static void consoleMessage(String area, String label, String s, PrintStream out) {
out.print(time());
String llabel = label == null ? "" : " | " + label;
out.print(area == null ? llabel : " | " + area + llabel);
if (s.contains("\n")) {
if (!s.startsWith("\n")) {
out.print(" | ");
}
out.print(s.replace("\n", NLINDENT));
}
else {
out.print(" | ");
out.print(s);
}
out.println();
}
private static void afterAppend(JTextArea area) {
int c = area.getLineCount();
while (c > ROWS) {
try {
int end = area.getLineEndOffset(1);
area.getDocument().remove(0, end);
c = area.getLineCount();
}
catch (BadLocationException e) {
throw new RuntimeException(e);
}
}
}
public static String FN = "\n ";
public static String FBN = "{\n ";
public static String formatted(JsonSerializable j) {
return j.getClass().getSimpleName() + j.toJson()
.replace("{\"", FBN + "\"").replace(",", "," + FN);
}
public static String formatted(Object o) {
return formatted(o.toString());
}
public static String formatted(String s) {
return s.replace("{", FBN).replace(", ", "," + FN);
}
}
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