OCI Java SDK: Retrieve Logs from Logging Service by a Specific Service

To retrieve logs from the Logging service in Oracle Cloud Infrastructure (OCI) using the Java SDK, you can use the `LoggingClient` class and its `listLogs` method. Here's an example:

import com.oracle.bmc.logging.LoggingClient;
import com.oracle.bmc.logging.model.Log;
import com.oracle.bmc.logging.requests.ListLogsRequest;
import com.oracle.bmc.logging.responses.ListLogsResponse;
import com.oracle.bmc.logging.model.LogSummary;
import com.oracle.bmc.identity.IdentityClient;
import com.oracle.bmc.identity.requests.ListServicesRequest;
import com.oracle.bmc.identity.responses.ListServicesResponse;
import com.oracle.bmc.identity.model.Service;
import com.oracle.bmc.identity.model.Tag;

import java.util.List;

public class LoggingExample {

    public static void main(String[] args) {
        String compartmentId = "your-compartment-id";
        String serviceName = "your-service-name";

        // Create a LoggingClient instance
        LoggingClient loggingClient = new LoggingClient(provider);

        // Retrieve the service ID based on the service name
        String serviceId = getServiceId(serviceName);

        // Create a ListLogsRequest with the compartment ID and service ID
        ListLogsRequest listLogsRequest = ListLogsRequest.builder()
                .compartmentId(compartmentId)
                .serviceId(serviceId)
                .build();

        // Retrieve the logs using the ListLogsRequest
        ListLogsResponse listLogsResponse = loggingClient.listLogs(listLogsRequest);

        // Iterate over the logs
        List<LogSummary> logSummaries = listLogsResponse.getItems();
        for (LogSummary logSummary : logSummaries) {
            // Retrieve the log details using the log ID
            Log log = loggingClient.getLog(logSummary.getId()).getLog();

            // Process the log as needed
            System.out.println(log);
        }

        // Close the LoggingClient instance
        loggingClient.close();
    }

    // Helper method to retrieve the service ID based on the service name
    private static String getServiceId(String serviceName) {
        // Create an IdentityClient instance
        IdentityClient identityClient = new IdentityClient(provider);

        // Create a ListServicesRequest with the compartment ID
        ListServicesRequest listServicesRequest = ListServicesRequest.builder()
                .compartmentId(compartmentId)
                .build();

        // Retrieve the services using the ListServicesRequest
        ListServicesResponse listServicesResponse = identityClient.listServices(listServicesRequest);

        // Iterate over the services and find the matching service name
        List<Service> services = listServicesResponse.getItems();
        for (Service service : services) {
            if (service.getDisplayName().equals(serviceName)) {
                // Return the service ID
                return service.getId();
            }
        }

        // Return null if service not found
        return null;
    }
}

Make sure to replace `your-compartment-id` with the actual compartment ID where the logs are stored, and `your-service-name` with the name of the service you want to retrieve logs for.

Note that you also need to configure the necessary authentication provider (e.g., using a configuration file or environment variables) before creating the `LoggingClient` and `IdentityClient` instances.