io.convergence_platform.common.helpers.ConvergenceHelpers Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of service-lib Show documentation

Holds the common functionality needed by all Convergence Platform-based services written in Java.

The newest version!

package io.convergence_platform.common.helpers;

import io.convergence_platform.services.observability.RequestLog;
import jakarta.servlet.http.HttpServletRequest;

import java.util.Enumeration;
import java.util.UUID;

public class ConvergenceHelpers {
    public static UUID getParentRequestIdFromRequest(HttpServletRequest request) {
        Enumeration iterator = request.getHeaderNames();
        UUID value = null;

        while (iterator.hasMoreElements()) {
            String header = iterator.nextElement();
            if (header.toLowerCase().equals(RequestLog.PARENT_REQUEST_ID_HEADER.toLowerCase())) {
                value = UUID.fromString(request.getHeader(header));
                break;
            }
        }

        return value;
    }

    public static UUID getRequestIdFromRequest(HttpServletRequest request) {
        return getRequestIdFromRequest(request, false);
    }

    public static UUID getRequestIdFromRequest(HttpServletRequest request, boolean nullIfMissing) {
        String value = getGatewayHeaderFromRequest(RequestLog.REQUEST_ID_HEADER, request);

        if (value == null && !nullIfMissing) {
            return UUID.randomUUID();
        } else if (value == null) {
            return null;
        }

        return UUID.fromString(value);
    }

    public static String getGatewayHeaderFromRequest(String gatewayHeader, HttpServletRequest request) {
        Enumeration iterator = request.getHeaderNames();
        String value = null;

        while (iterator.hasMoreElements()) {
            String header = iterator.nextElement();
            if (header.toLowerCase().equals(gatewayHeader.toLowerCase())) {
                value = request.getHeader(header);
                break;
            }
        }

        return value;
    }

    public static String coalese(String... paths) {
        String result = "";

        for (String path : paths) {
            if (path != null && !path.trim().equals("")) {
                result = path;
                break;
            }
        }

        return result;
    }

}