Spring Authorization Sample Thread Local Context

MetadataFilter.java

public class MetadataFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {

        try {
            String tenantId = request.getHeader('X-Tenant-Id');
            TenantContextHolder.getContext().setTenantId(tenantId);
            filterChain.doFilter(request, response);
        } catch (Exception e) {
            response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
        } finally {
            MetadataContextHolder.clearContext();
        }
    }
}

TenantContext.java

@Getter
@Setter
public class TenantContext {
    private String tenantId = "";
}

TenantContextHolder.java

public class TenantContextHolder {

    private static final ThreadLocal<TenantContext> TENANT_CONTEXT = new ThreadLocal<>();

    public static TenantContext getContext() {

        TenantContext context = TENANT_CONTEXT.get();

        if (context == null) {
            context = createEmptyContext();
            TENANT_CONTEXT.set(context);
        }
        return METADATA_CONTEXT.get();
    }

    public static void setContext(TenantContext context) {

        METADATA_CONTEXT.set(context);
    }

    private static TenantContext createEmptyContext() {

        return new TenantContext();
    }

    public static void clearContext() {

        TENANT_CONTEXT.remove();
    }
}