package ca.uhn.fhir.jpa.demo;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import javax.servlet.ServletException;
import org.hl7.fhir.dstu3.model.Meta;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.cors.CorsConfiguration;
import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.context.FhirVersionEnum;
import ca.uhn.fhir.jpa.dao.DaoConfig;
import ca.uhn.fhir.jpa.dao.IFhirSystemDao;
import ca.uhn.fhir.jpa.provider.JpaConformanceProviderDstu1;
import ca.uhn.fhir.jpa.provider.JpaConformanceProviderDstu2;
import ca.uhn.fhir.jpa.provider.JpaSystemProviderDstu1;
import ca.uhn.fhir.jpa.provider.JpaSystemProviderDstu2;
import ca.uhn.fhir.jpa.provider.dstu3.JpaConformanceProviderDstu3;
import ca.uhn.fhir.jpa.provider.dstu3.JpaSystemProviderDstu3;
import ca.uhn.fhir.jpa.provider.dstu3.TerminologyUploaderProviderDstu3;
import ca.uhn.fhir.jpa.search.DatabaseBackedPagingProvider;
import ca.uhn.fhir.model.api.IResource;
import ca.uhn.fhir.model.dstu2.composite.MetaDt;
import ca.uhn.fhir.model.dstu2.resource.Bundle;
import ca.uhn.fhir.narrative.DefaultThymeleafNarrativeGenerator;
import ca.uhn.fhir.parser.StrictErrorHandler;
import ca.uhn.fhir.rest.server.ETagSupportEnum;
import ca.uhn.fhir.rest.server.EncodingEnum;
import ca.uhn.fhir.rest.server.IResourceProvider;
import ca.uhn.fhir.rest.server.RestfulServer;
import ca.uhn.fhir.rest.server.interceptor.CorsInterceptor;
import ca.uhn.fhir.rest.server.interceptor.IServerInterceptor;
public class JpaServerDemo extends RestfulServer {
private static final long serialVersionUID = 1L;
private WebApplicationContext myAppCtx;
@SuppressWarnings("unchecked")
@Override
protected void initialize() throws ServletException {
super.initialize();
/*
* We want to support FHIR DSTU2 format. This means that the server
* will use the DSTU2 bundle format and other DSTU2 encoding changes.
*
* If you want to use DSTU1 instead, change the following line, and
* change the 2 occurrences of dstu2 in web.xml to dstu1
*/
FhirVersionEnum fhirVersion = FhirVersionEnum.DSTU3;
setFhirContext(new FhirContext(fhirVersion));
// Get the spring context from the web container (it's declared in web.xml)
myAppCtx = ContextLoaderListener.getCurrentWebApplicationContext();
/*
* The BaseJavaConfigDstu2.java class is a spring configuration
* file which is automatically generated as a part of hapi-fhir-jpaserver-base and
* contains bean definitions for a resource provider for each resource type
*/
String resourceProviderBeanName;
if (fhirVersion == FhirVersionEnum.DSTU1) {
resourceProviderBeanName = "myResourceProvidersDstu1";
} else if (fhirVersion == FhirVersionEnum.DSTU2) {
resourceProviderBeanName = "myResourceProvidersDstu2";
} else if (fhirVersion == FhirVersionEnum.DSTU3) {
resourceProviderBeanName = "myResourceProvidersDstu3";
} else {
throw new IllegalStateException();
}
List<IResourceProvider> beans = myAppCtx.getBean(resourceProviderBeanName, List.class);
setResourceProviders(beans);
/*
* The system provider implements non-resource-type methods, such as
* transaction, and global history.
*/
Object systemProvider;
if (fhirVersion == FhirVersionEnum.DSTU1) {
systemProvider = myAppCtx.getBean("mySystemProviderDstu1", JpaSystemProviderDstu1.class);
} else if (fhirVersion == FhirVersionEnum.DSTU2) {
systemProvider = myAppCtx.getBean("mySystemProviderDstu2", JpaSystemProviderDstu2.class);
} else if (fhirVersion == FhirVersionEnum.DSTU3) {
systemProvider = myAppCtx.getBean("mySystemProviderDstu3", JpaSystemProviderDstu3.class);
} else {
throw new IllegalStateException();
}
setPlainProviders(systemProvider);
/*
* The conformance provider exports the supported resources, search parameters, etc for
* this server. The JPA version adds resource counts to the exported statement, so it
* is a nice addition.
*/
if (fhirVersion == FhirVersionEnum.DSTU1) {
IFhirSystemDao<List<IResource>, MetaDt> systemDao = myAppCtx.getBean("mySystemDaoDstu1", IFhirSystemDao.class);
JpaConformanceProviderDstu1 confProvider = new JpaConformanceProviderDstu1(this, systemDao);
confProvider.setImplementationDescription("Example Server");
setServerConformanceProvider(confProvider);
} else if (fhirVersion == FhirVersionEnum.DSTU2) {
IFhirSystemDao<Bundle, MetaDt> systemDao = myAppCtx.getBean("mySystemDaoDstu2", IFhirSystemDao.class);
JpaConformanceProviderDstu2 confProvider = new JpaConformanceProviderDstu2(this, systemDao,
myAppCtx.getBean(DaoConfig.class));
confProvider.setImplementationDescription("Example Server");
setServerConformanceProvider(confProvider);
} else if (fhirVersion == FhirVersionEnum.DSTU3) {
IFhirSystemDao<org.hl7.fhir.dstu3.model.Bundle, Meta> systemDao = myAppCtx.getBean("mySystemDaoDstu3", IFhirSystemDao.class);
JpaConformanceProviderDstu3 confProvider = new JpaConformanceProviderDstu3(this, systemDao,
myAppCtx.getBean(DaoConfig.class));
confProvider.setImplementationDescription("Example Server");
setServerConformanceProvider(confProvider);
} else {
throw new IllegalStateException();
}
/*
* Enable ETag Support (this is already the default)
*/
setETagSupport(ETagSupportEnum.ENABLED);
/*
* This server tries to dynamically generate narratives
*/
FhirContext ctx = getFhirContext();
ctx.setNarrativeGenerator(new DefaultThymeleafNarrativeGenerator());
/*
* Default to JSON and pretty printing
*/
setDefaultPrettyPrint(true);
setDefaultResponseEncoding(EncodingEnum.JSON);
/*
* -- New in HAPI FHIR 1.5 --
* This configures the server to page search results to and from
* the database, instead of only paging them to memory. This may mean
* a performance hit when performing searches that return lots of results,
* but makes the server much more scalable.
*/
setPagingProvider(myAppCtx.getBean(DatabaseBackedPagingProvider.class));
/*
* Enable CORS
*/
CorsConfiguration config = new CorsConfiguration();
CorsInterceptor corsInterceptor = new CorsInterceptor(config);
config.addAllowedHeader("Origin");
config.addAllowedHeader("Accept");
config.addAllowedHeader("Prefer");
config.addAllowedHeader("X-Requested-With");
config.addAllowedHeader("Content-Type");
config.addAllowedHeader("Access-Control-Request-Method");
config.addAllowedHeader("Access-Control-Request-Headers");
config.addAllowedOrigin("*");
config.addExposedHeader("Location");
config.addExposedHeader("Content-Location");
config.setAllowedMethods(Arrays.asList("GET","POST","PUT","DELETE","OPTIONS"));
registerInterceptor(corsInterceptor);
/*
* Load interceptors for the server from Spring (these are defined in FhirServerConfig.java)
*/
Collection<IServerInterceptor> interceptorBeans = myAppCtx.getBeansOfType(IServerInterceptor.class).values();
for (IServerInterceptor interceptor : interceptorBeans) {
this.registerInterceptor(interceptor);
}
/*
* If you are hosting this server at a specific DNS name, the server will try to
* figure out the FHIR base URL based on what the web container tells it, but
* this doesn't always work. If you are setting links in your search bundles that
* just refer to "localhost", you might want to use a server address strategy:
*/
//setServerAddressStrategy(new HardcodedServerAddressStrategy("http://mydomain.com/fhir/baseDstu2"));
/*
* If you are using DSTU3+, you may want to add a terminology uploader, which allows
* uploading of external terminologies such as Snomed CT. Note that this uploader
* does not have any security attached (any anonymous user may use it by default)
* so it is a potential security vulnerability. Consider using an AuthorizationInterceptor
* with this feature.
*/
//if (fhirVersion == FhirVersionEnum.DSTU3) {
// registerProvider(myAppCtx.getBean(TerminologyUploaderProviderDstu3.class));
//}
}
}