Added API call for bootstrapping node

src/main/java/org/qortal/api/restricted/resource/AdminResource.java

@@ -257,6 +257,37 @@ public String restart(@HeaderParam(Security.API_KEY_HEADER) String apiKey) {
 		return "true";
 	}
 
+	@GET
+	@Path("/bootstrap")
+	@Operation(
+		summary = "Bootstrap",
+		description = "Delete and download new database archive",
+		responses = {
+			@ApiResponse(
+				description = "\"true\"",
+				content = @Content(mediaType = MediaType.TEXT_PLAIN, schema = @Schema(type = "string"))
+			)
+		}
+	)
+	@SecurityRequirement(name = "apiKey")
+	public String bootstrap(@HeaderParam(Security.API_KEY_HEADER) String apiKey) {
+		Security.checkApiCallAllowed(request);
+
+		new Thread(() -> {
+			// Short sleep to allow HTTP response body to be emitted
+			try {
+				Thread.sleep(1000);
+			} catch (InterruptedException e) {
+				// Not important
+			}
+
+			AutoUpdate.attemptBootstrap();
+
+		}).start();
+
+		return "true";
+	}
+
 	@GET
 	@Path("/summary")
 	@Operation(

src/main/java/org/qortal/controller/AutoUpdate.java

@@ -23,9 +23,12 @@
 import java.io.OutputStream;
 import java.lang.management.ManagementFactory;
 import java.nio.ByteBuffer;
+import java.nio.file.FileVisitResult;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
@@ -365,4 +368,97 @@ public static boolean attemptRestart() {
 		}
 	}
 
+	public static boolean attemptBootstrap() {
+		LOGGER.info(String.format("Bootstrapping node..."));
+
+		// Give repository a chance to backup in case things go badly wrong (if enabled)
+		if (Settings.getInstance().getRepositoryBackupInterval() > 0) {
+			try {
+				// Timeout if the database isn't ready for backing up after 60 seconds
+				long timeout = 60 * 1000L;
+				RepositoryManager.backup(true, "backup", timeout);
+
+			} catch (TimeoutException e) {
+				LOGGER.info("Attempt to backup repository failed due to timeout: {}", e.getMessage());
+				// Continue with the bootstrap anyway...
+			}
+		}
+
+		// Get the repository path from settings
+		String repositoryPath = Settings.getInstance().getRepositoryPath();
+		LOGGER.debug(String.format("Repository path: %s", repositoryPath));
+
+		// Call ApplyUpdate to end this process (unlocking current JAR so it can be replaced)
+		String javaHome = System.getProperty("java.home");
+		LOGGER.debug(String.format("Java home: %s", javaHome));
+
+		Path javaBinary = Paths.get(javaHome, "bin", "java");
+		LOGGER.debug(String.format("Java binary: %s", javaBinary));
+
+		try {
+			Path directory = Paths.get(repositoryPath);
+			Files.walkFileTree(directory, new SimpleFileVisitor<Path>() {
+				@Override
+				public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+					Files.delete(file);
+					return FileVisitResult.CONTINUE;
+				}
+
+				@Override
+				public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+					Files.delete(dir);
+					return FileVisitResult.CONTINUE;
+				}
+			});
+
+			List<String> javaCmd = new ArrayList<>();
+
+			// Java runtime binary itself
+			javaCmd.add(javaBinary.toString());
+
+			// JVM arguments
+			javaCmd.addAll(ManagementFactory.getRuntimeMXBean().getInputArguments());
+
+			// Disable, but retain, any -agentlib JVM arg as sub-process might fail if it tries to reuse same port
+			javaCmd = javaCmd.stream()
+					.map(arg -> arg.replace("-agentlib", AGENTLIB_JVM_HOLDER_ARG))
+					.collect(Collectors.toList());
+
+			// Remove JNI options as they won't be supported by command-line 'java'
+			// These are typically added by the AdvancedInstaller Java launcher EXE
+			javaCmd.removeAll(Arrays.asList("abort", "exit", "vfprintf"));
+
+			// Call ApplyUpdate using JAR
+			javaCmd.addAll(Arrays.asList("-cp", JAR_FILENAME, ApplyUpdate.class.getCanonicalName()));
+
+			// Add command-line args saved from start-up
+			String[] savedArgs = Controller.getInstance().getSavedArgs();
+			if (savedArgs != null)
+				javaCmd.addAll(Arrays.asList(savedArgs));
+
+			LOGGER.info(String.format("Restarting node with: %s", String.join(" ", javaCmd)));
+
+			SysTray.getInstance().showMessage(Translator.INSTANCE.translate("SysTray", "AUTO_UPDATE"), //TODO
+					Translator.INSTANCE.translate("SysTray", "APPLYING_UPDATE_AND_RESTARTING"), //TODO
+					MessageType.INFO);
+
+			ProcessBuilder processBuilder = new ProcessBuilder(javaCmd);
+
+			// New process will inherit our stdout and stderr
+			processBuilder.redirectOutput(ProcessBuilder.Redirect.INHERIT);
+			processBuilder.redirectError(ProcessBuilder.Redirect.INHERIT);
+
+			Process process = processBuilder.start();
+
+			// Nothing to pipe to new process, so close output stream (process's stdin)
+			process.getOutputStream().close();
+
+			return true; // restarting node OK
+		} catch (Exception e) {
+			LOGGER.error(String.format("Failed to restart node: %s", e.getMessage()));
+
+			return true; // repo was okay, even if applying update failed
+		}
+	}
+
 }