JAL-3210 Barebones gradle/buildship/eclipse. See README

[jalview.git] / src / jalview / bin / Launcher.java

diff --git a/src/jalview/bin/Launcher.java b/src/jalview/bin/Launcher.java
new file mode 100644 (file)
index 0000000..412f119
--- /dev/null
+++ b/src/jalview/bin/Launcher.java
@@ -0,0 +1,178 @@
+package jalview.bin;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.management.ManagementFactory;
+import java.util.ArrayList;
+
+public class Launcher
+{
+
+  private final static String startClass = "jalview.bin.Jalview";
+
+  private final static int maxHeapSizePerCent = 90;
+
+  private final static String maxHeapSizePerCentProperty = "jvmmempc";
+
+  private final static String dockIconPath = "JalviewLogo_Huge.png";
+
+  public static void main(String[] args)
+  {
+    final String javaBin = System.getProperty("java.home") + File.separator
+            + "bin" + File.separator + "java";
+
+    ArrayList<String> command = new ArrayList<>();
+    command.add(javaBin);
+
+    String memSetting = null;
+
+    boolean isAMac = System.getProperty("os.name").indexOf("Mac") > -1;
+
+    for (String jvmArg : ManagementFactory.getRuntimeMXBean()
+            .getInputArguments())
+    {
+      command.add(jvmArg);
+    }
+    command.add("-cp");
+    command.add(ManagementFactory.getRuntimeMXBean().getClassPath());
+    ArrayList<String> arguments = new ArrayList<>();
+    for (String arg : args)
+    {
+      arguments.add(arg);
+    }
+
+    // add memory setting if not specified
+    boolean memSet = false;
+    boolean dockIcon = false;
+    boolean dockName = false;
+    ARG: for (int i = 0; i < command.size(); i++)
+    {
+      String arg = command.get(i);
+      if (arg.startsWith("-Xmx"))
+      {
+        memSetting = arg;
+        memSet = true;
+      }
+      else if (arg.startsWith("-Xdock:icon"))
+      {
+        dockIcon = true;
+      }
+      else if (arg.startsWith("-Xdock:name"))
+      {
+        dockName = true;
+      }
+    }
+
+    if (!memSet)
+    {
+      long maxMemLong = -1;
+      int percent = maxHeapSizePerCent;
+      String jvmmempc = System.getProperty(maxHeapSizePerCentProperty);
+      try
+      {
+        if (jvmmempc != null)
+        {
+          int trypercent = Integer.parseInt(jvmmempc);
+          if (0 < trypercent && trypercent <= 100)
+          {
+            percent = trypercent;
+          }
+          else
+          {
+            System.out.println("Property '" + maxHeapSizePerCentProperty
+                    + "' should be in range 1..100");
+          }
+        }
+      } catch (Exception e)
+      {
+        System.out.println("Error parsing " + maxHeapSizePerCentProperty
+                + " '" + jvmmempc + "'");
+      }
+
+      try
+      {
+        maxMemLong = MemorySetting.memPercent(percent);
+      } catch (Exception e)
+      {
+        e.printStackTrace();
+      } catch (Throwable t)
+      {
+        t.printStackTrace();
+      }
+
+      if (maxMemLong > 0)
+      {
+        memSetting = "-Xmx" + Long.toString(maxMemLong);
+        command.add(memSetting);
+      }
+    }
+
+    if (isAMac)
+    {
+      if (!dockIcon)
+      {
+        command.add("-Xdock:icon=" + dockIconPath);
+      }
+      if (!dockName)
+      {
+        // -Xdock:name=... doesn't actually work :(
+        // Leaving it in in case it gets fixed
+        command.add("-Xdock:name=" + "Jalview");
+      }
+    }
+
+    command.add(startClass);
+    command.addAll(arguments);
+
+    final ProcessBuilder builder = new ProcessBuilder(command);
+
+    // System.out.println("COMMAND: " + String.join(" ", builder.command()));
+    System.out.println("Running " + startClass + " with "
+            + (memSetting == null ? "no memSetting" : memSetting));
+
+    try
+    {
+      builder.inheritIO();
+      Process process = builder.start();
+      process.waitFor();
+    } catch (IOException e)
+    {
+      if (e.getMessage().toLowerCase().contains("memory"))
+      {
+        System.out.println("Caught a memory exception: " + e.getMessage());
+        // Probably the "Cannot allocate memory" error, try without the memory setting
+        ArrayList<String> commandNoMem = new ArrayList<>();
+        for (int i = 0; i < command.size(); i++)
+        {
+          if (!command.get(i).startsWith("-Xmx"))
+          {
+            commandNoMem.add(command.get(i));
+          }
+        }
+        final ProcessBuilder builderNoMem = new ProcessBuilder(
+                commandNoMem);
+        System.out.println("NO MEM COMMAND: "
+                + String.join(" ", builderNoMem.command()));
+        try
+        {
+          builderNoMem.inheritIO();
+          Process processNoMem = builderNoMem.start();
+          processNoMem.waitFor();
+        } catch (Exception ex)
+        {
+          ex.printStackTrace();
+        }
+      }
+      else
+      {
+        e.printStackTrace();
+      }
+    } catch (Exception e)
+    {
+      e.printStackTrace();
+    }
+    // System.exit(0);
+
+  }
+
+}