Add CdsHooksServlet
This commit is contained in:
Brenin Rhodes
@@ -0,0 +1,126 @@
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package ca.uhn.fhir.jpa.starter.cdshooks;
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import java.io.IOException;
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import java.util.stream.Collectors;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.http.entity.ContentType;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Configurable;
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import com.fasterxml.jackson.annotation.JsonInclude;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.google.gson.GsonBuilder;
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import com.google.gson.JsonParser;
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import ca.uhn.fhir.jpa.starter.AppProperties;
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import ca.uhn.fhir.rest.server.RestfulServer;
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import ca.uhn.fhir.rest.server.exceptions.BaseServerResponseException;
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import ca.uhn.hapi.fhir.cdshooks.api.ICdsServiceRegistry;
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import ca.uhn.hapi.fhir.cdshooks.api.json.CdsServiceRequestJson;
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import ca.uhn.hapi.fhir.cdshooks.api.json.CdsServiceResponseJson;
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import ca.uhn.hapi.fhir.cdshooks.api.json.CdsServicesJson;
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@Configurable
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public class CdsHooksServlet extends HttpServlet {
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private static final Logger logger = LoggerFactory.getLogger(CdsHooksServlet.class);
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private static final long serialVersionUID = 1L;
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@Autowired
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private AppProperties appProperties;
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@Autowired
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ICdsServiceRegistry cdsServiceRegistry;
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@Autowired
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RestfulServer restfulServer;
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// private final ServletRequestDetails requestDetails = new ServletRequestDetails();
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// CORS Pre-flight
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@Override
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protected void doOptions(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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//ErrorHandling.setAccessControlHeaders(resp, appProperties);
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resp.setHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType());
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resp.setHeader("X-Content-Type-Options", "nosniff");
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resp.setStatus(HttpServletResponse.SC_OK);
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}
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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logger.info(request.getRequestURI());
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if (!request.getRequestURL().toString().endsWith("/cds-services")
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&& !request.getRequestURL().toString().endsWith("/cds-services/")) {
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logger.error(request.getRequestURI());
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throw new ServletException("This servlet is not configured to handle GET requests.");
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}
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//ErrorHandling.setAccessControlHeaders(response, myAppProperties);
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response.setHeader("Content-Type", ContentType.APPLICATION_JSON.getMimeType());
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response.getWriter().println(new GsonBuilder().setPrettyPrinting().create().toJson(getServices()));
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}
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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try {
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if (request.getContentType() == null || !request.getContentType().startsWith("application/json")) {
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throw new ServletException(String.format("Invalid content type %s. Please use application/json.",
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request.getContentType()));
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}
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logger.info(request.getRequestURI());
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String service = request.getPathInfo().replace("/", "");
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ObjectMapper mapper = new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL);
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String requestJson = request.getReader().lines().collect(Collectors.joining());
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CdsServiceRequestJson cdsHooksRequest = mapper.readValue(requestJson, CdsServiceRequestJson.class);
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logRequestInfo(cdsHooksRequest, requestJson);
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CdsServiceResponseJson serviceResponseJson = cdsServiceRegistry.callService(service, cdsHooksRequest);
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// Using GSON pretty print format as Jackson's is ugly
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String jsonResponse = new GsonBuilder().disableHtmlEscaping().setPrettyPrinting().create()
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.toJson(JsonParser.parseString(mapper.writeValueAsString(serviceResponseJson)));
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logger.info(jsonResponse);
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response.setContentType("text/json;charset=UTF-8");
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response.getWriter().println(jsonResponse);
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} catch (BaseServerResponseException e) {
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// ErrorHandling.handleError(response, "ERROR: Exception connecting to remote server.", e, myAppProperties);
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logger.error(e.toString());
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} catch (Exception e) {
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logger.error(e.toString());
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throw new ServletException("ERROR: Exception in cds-hooks processing.", e);
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}
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}
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private void logRequestInfo(CdsServiceRequestJson request, String jsonRequest) {
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logger.info(jsonRequest);
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logger.info("cds-hooks hook instance: {}", request.getHookInstance());
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// logger.info("cds-hooks maxCodesPerQuery: {}", this.getProviderConfiguration().getMaxCodesPerQuery());
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// logger.info("cds-hooks expandValueSets: {}", this.getProviderConfiguration().getExpandValueSets());
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// logger.info("cds-hooks queryBatchThreshold: {}", this.getProviderConfiguration().getQueryBatchThreshold());
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// logger.info("cds-hooks searchStyle: {}", this.getProviderConfiguration().getSearchStyle());
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// logger.info("cds-hooks prefetch maxUriLength: {}", this.getProviderConfiguration().getMaxUriLength());
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logger.info("cds-hooks local server address: {}", appProperties.getServer_address());
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logger.info("cds-hooks fhir server address: {}", request.getFhirServer());
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// logger.info("cds-hooks cql_logging_enabled: {}", this.getProviderConfiguration().getCqlLoggingEnabled());
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}
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private CdsServicesJson getServices() {
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return cdsServiceRegistry.getCdsServicesJson();
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}
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// public DebugMap getDebugMap() {
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// DebugMap debugMap = new DebugMap();
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// if (cqlProperties.getCqlRuntimeOptions().isDebugLoggingEnabled()) {
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// // getOptions().getCqlEngineOptions().isDebugLoggingEnabled()) {
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// debugMap.setIsLoggingEnabled(true);
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// }
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// return debugMap;
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// }
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}
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@@ -0,0 +1,49 @@
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package ca.uhn.fhir.jpa.starter.cdshooks;
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import org.hl7.fhir.instance.model.api.IBaseResource;
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import org.springframework.beans.factory.FactoryBean;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
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import org.springframework.boot.web.servlet.ServletRegistrationBean;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.Import;
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import ca.uhn.fhir.jpa.cache.IResourceChangeListenerRegistry;
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import ca.uhn.fhir.rest.server.RestfulServer;
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import ca.uhn.hapi.fhir.cdshooks.api.ICdsHooksDaoAuthorizationSvc;
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import ca.uhn.hapi.fhir.cdshooks.config.CdsHooksConfig;
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import ca.uhn.hapi.fhir.cdshooks.svc.CdsHooksContextBooter;
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@Configuration
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@Import(CdsHooksConfig.class)
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public class StarterCdsHooksConfig {
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@Bean
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public CdsHooksContextBooter cdsHooksContextBooter() {
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// ourLog.info("No Spring Context provided. Assuming all CDS Services will be registered dynamically.");
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return new CdsHooksContextBooter();
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}
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public static class CdsHooksDaoAuthorizationSvc implements ICdsHooksDaoAuthorizationSvc {
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@Override
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public void authorizePreShow(IBaseResource theResource) {}
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}
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@Bean
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ICdsHooksDaoAuthorizationSvc cdsHooksDaoAuthorizationSvc() {
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return new CdsHooksDaoAuthorizationSvc();
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}
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@Bean
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public ServletRegistrationBean<CdsHooksServlet> cdsHooksRegistrationBean(AutowireCapableBeanFactory beanFactory) {
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CdsHooksServlet cdsHooksServlet = new CdsHooksServlet();
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beanFactory.autowireBean(cdsHooksServlet);
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ServletRegistrationBean<CdsHooksServlet> registrationBean = new ServletRegistrationBean<>();
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registrationBean.setName("cds-hooks servlet");
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registrationBean.setServlet(cdsHooksServlet);
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registrationBean.addUrlMappings("/cds-services/*");
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registrationBean.setLoadOnStartup(1);
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return registrationBean;
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}
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}
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