import java.io.*;

import java.util.*;

public class LogDependencyResolver {

public static void main(String[] args) {

// Example Usage: Replace with your log file paths

String logFile1 = "log1.txt";

String logFile2 = "log2.txt";

String logFile3 = "log3.txt";

Map<String, List<String>> dependencies = new HashMap<>();

dependencies.put("log2.txt", Arrays.asList("log1.txt")); // log2 depends on log1

dependencies.put("log3.txt", Arrays.asList("log2.txt")); // log3 depends on log2

resolveDependencies(logFile1, logFile2, logFile3, dependencies);

}

public static void resolveDependencies(String logFile1, String logFile2, String logFile3, Map<String, List<String>> dependencies) {

// Resolve dependencies in a synchronous manner

// 1. Process dependencies for logFile3

processLogFile(logFile3, dependencies);

// 2. Process dependencies for logFile2

processLogFile(logFile2, dependencies);

// 3. Process logFile1 as it's the root (no dependencies)

processLogFile(logFile1, dependencies);

}

private static void processLogFile(String logFile, Map<String, List<String>> dependencies) {

try (BufferedReader reader = new BufferedReader(new FileReader(logFile))) {

String line;

while ((line = reader.readLine()) != null) {

// Simulate log processing (e.g., parsing, validation)

System.out.println("Processing: " + logFile + " - " + line);

// Check dependencies and execute if required

if (dependencies.containsKey(logFile)) {

List<String> requiredLogs = dependencies.get(logFile);

for (String requiredLog : requiredLogs) {

try (BufferedReader reader = new BufferedReader(new FileReader(requiredLog))) {

// Simulate dependency check/validation

System.out.println(" Dependency check for: " + requiredLog);

// Do something with the dependency. In a real scenario,

// this might involve checking for existence, validity, etc.

} catch (FileNotFoundException e) {

System.err.println("Error: Dependency file not found: " + requiredLog);

return; // Stop processing if a dependency is missing.

}

}

}

}

} catch (IOException e) {

System.err.println("Error reading log file: " + logFile + " - " + e.getMessage());

}

}

}