Create a new Gradle project called com. Add the following to dependency to your build. Create the following data model and a Singleton which serves as the data provider for the model. We use the implementation based on an enumeration. Please see the link for details.
The following HTML form will allow to post new data to the service. This TodosResource uses the PathParam annotation to define that the id is inserted as parameter. The next chapter will use the Jersey client libraries to issue get, post and delete. To test your service you can create a new class in your server project. This project has already all required libs in the classpath, so this is faster than creating a new project.
If you need more assistance we offer Online Training and Onsite training as well as consulting. In this tutorial Eclipse 4. What is REST? PUT creates a new resource.
It must also be idempotent. POST updates an existing resource or creates a new resource. Installation of Jersey 2. Use Gradle compile 'org. Manual setup of Jersey libraries in an Eclipse project Download the Jersey distribution as zip file from the Jersey download site.
Web container For this tutorial you can use any web container, for example Tomcat or the Google App Engine. The following description is based on a local Apache Tomcat installation. Gradle setup Open the build.
Prerequisites The following description assumes that you are familiar with creating web applications in Eclipse. To import the Jersey dependencies, add the following dependency to your build. Java Class Create the following class. GET ; import javax. Path ; import javax. Produces ; import javax. Run your rest service To run your web application in Eclipse, make sure to run the gradle task eclipseWtp first.
URI ; import javax. Client ; import javax. ClientBuilder ; import javax. WebTarget ; import javax. MediaType ; import javax. Response ; import javax. UriBuilder ; import org. Create new Gradle project Create a new Gradle project named com.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Status ;. HashMap ;. Map ;. Logger ;. SelectorThread ;. GrizzlyWebContainerFactory ;.
ArrayList ;. List ;. Consumes ;. GET ;. POST ;. Path ;. Produces ;. MediaType ;. The Resteasy servlet is responsible for initializing some basic components of Resteasy. It is likely that support for pre The resteasy. For example, if the url-pattern is. The javax. Application class is a standard JAX-RS class that you may implement to provide information on your deployment.
If your web. This section is pretty much deprecated if you are using a Servlet 3. Skip it if you are and read the configuration section above on installing in Servlet 3. The initialization of Resteasy can be performed within a ServletContextListener instead of within the Servlet. You may need this if you are writing custom Listeners that need to interact with Resteasy at boot time.
The org. ResteasyProviderFactory and org. From these instances you can programmatically interact with Resteasy registration interfaces. The downside of running Resteasy as a Servlet is that you cannot have static resources like. Resteasy allows you to run as a Filter instead. In Resteasy, the minimal set of modules needed for the client framework consists of resteasy-jaxrs and resteasy-client. You can access them by way of maven:. The requests would be handled by the Library class:.
If it exists on both the class and method, the relative path to the resource method is a concatenation of the class and method. In the javax. You place these on public methods that you want to map to that certain kind of HTTP method. As long as there is a Path annotation on the class, you do not have to have a Path annotation on the method you are mapping.
You can have more than one HTTP method as long as they can be distinguished from other methods. The Path annotation is not limited to simple path expressions. You also have the ability to insert regular expressions into Path's value.
The regular-expression part is optional. When the expression is not provided, it defaults to a wildcard matching of one particular segment. In regular-expression terms, the expression defaults to. PathParam is a parameter annotation which allows you to map variable URI path fragments into your method call. What this allows you to do is embed variable identification within the URIs of your resources.
In the above example, an isbn URI parameter is used to pass information about the book we want to access. The parameter type you inject into can be any primitive type, a String, or any Java object that has a constructor that takes a String parameter, or a static valueOf method that takes a String as a parameter.
For example, lets say we wanted isbn to be a real object. We could do:. You are allowed to specify one or more path params embedded in one URI segment. Here are some examples:. For the following requests, lets see what the values of the "param" and "many" PathParams would be:. The specification has a very simple abstraction for examining a fragment of the URI path being invoked on javax.
This is very useful if you have a bunch of PathParams that use matrix parameters. The idea of matrix parameters is that they are an arbitrary set of name-value pairs embedded in a uri path segment. The PathSegment object gives you access to these parameters. See also MatrixParam. The basic idea of matrix parameters is that it represents resources that are addressable by their attributes as well as their raw id.
The QueryParam annotation allows you to map a URI query string parameter or url form encoded parameter to your method invocation. Currently since Resteasy is built on top of a Servlet, it does not distinguish between URI query strings or url form encoded parameters. Like PathParam, your parameter type can be an String, primitive, or class that has a String constructor or static valueOf method. For example, MediaType has a valueOf method and you could do:.
See the javadocs for org. LinkHeader, org. Link, and org. The main advantage of Link headers over Atom links in the resource is that those links are available without parsing the entity body. RESTEasy allows you to inject Atom links directly inside the entity objects you are sending to the client, via auto-discovery.
The main advantage over Link headers is that you can have any number of Atom links directly over the concerned resources, for any number of resources in the response.
For example, you can have Atom links for the root response entity, and also for each of its children entities. There is no configuration required to be able to inject Atom links in your resource representation, you just have to have this maven artifact in your path:. The following example illustrates how you would declare everything in order to get the Atom links injected in your book store:. This is all done by annotating the methods with the LinkResource annotation.
It supports the following optional parameters:. For GET methods returning a Collection. For GET methods returning a non- Collection. You can add several LinkResource annotations on a single method by enclosing them in a LinkResources annotation.
This way you can add links to the same method on several resource types. This is done either automatically by guessing the list of values from the entity, or by specifying the values in the LinkResource pathParameters parameter.
If there are more than one URI template value to find in a given entity, you can annotate your entity with ResourceIDs to list the names of fields or properties that make up this entity's Id. If there are other URI template values required from a parent entity, we try to find that parent in a field or Java Bean property annotated with ParentResource. The UEL expressions are evaluated in the context of the entity, which means that any unqualified variable will be taken as a property for the entity itself, with the special variable this bound to the entity we're generating links for.
The previous example of Comment service could be declared as such:. You can restrict which links are injected in the resource based on security restrictions for the client, so that if the current client doesn't have permission to delete a resource he will not be presented with the "delete" link relation. We've seen that both the URI template values and the security constraints of LinkResource use UEL to evaluate expressions, and we provide a basic UEL context with access only to the entity we're injecting links in, and nothing more.
This annotation's value should point to a class that implements the ELProvider interface, which wraps the default ELContext in order to add any missing functions. For example, if you want to support the Seam annotation s:hasPermission target, permission in your security constraints, you can add a package-info.
Sometimes it is useful to add resources which are just containers or layers on other resources. For example if you want to represent a collection of Comment with a start index and a certain number of entries, in order to implement paging.
Such a collection is not really an entity in your model, but it should obtain the "add" and "list" link relations for the Comment entity. This is possible using resource facades. Since in most cases the instance of the T type is not directly available in the resource facade, we need another way to extract its URI template values, and this is done by calling the resource facade's pathParameters method to obtain a map of URI template values by name.
This map will be used to fill in the URI template values for any link generated for T , if there are enough values in the map. Here is an example of such a resource facade for a collection of Comment s:. A matrix parameter example is:. There is one big problem with MatrixParam that the current version of the specification does not resolve. What if the same MatrixParam exists twice in different path segments? In this case, right now, its probably better to use PathParam combined with PathSegment.
The CookieParam annotation allows you to inject the value of a cookie or an object representation of an HTTP request cookie into your method invocation. You can also get an object representation of the cookie via the javax. Cookie class. This is illegal:. This is useful if you have a lot of parameters on your method and you want to condense them into a value object. Also, Form has some expanded FormParam features.
If you specify a prefix within the Form param, this will prepend a prefix to any form parameter lookup. For example, let's say you have one Address class, but want to reference invoice and shipping addresses from the same set of form parameters:.
The Person. Also, prefix mappings also support lists and maps:. The following form params could be submitted and the Person.
Encoded annotation can be used on a class, method, or param. By default, inject PathParam and QueryParams are decoded. By additionally adding the Encoded annotation, the value of these params will be provided in encoded form. In the above example, the value of the PathParam injected into the param of the get method will be URL encoded.
Adding the Encoded annotation as a paramater annotation triggers this affect. You may also use the Encoded annotation on the entire method and any combination of QueryParam or PathParam's values will be encoded.
In the above example, the values of the "foo" query param and "param" path param will be injected as encoded values. The Path annotation has an attribute called encode. Controls whether the literal part of the supplied value those characters that are not part of a template variable are URL encoded. If false then all characters must be valid URI characters. By default this is set to true.
If you want to encoded the characters yourself, you may. Much like Path. Resource classes are able to partially process a request and provide another "sub" resource object that can process the remainder of the request. Resource methods that have a Path annotation, but no HTTP method are considered sub-resource locators. Their job is to provide an object that can process the request. In the above example ShoppingStore is a root resource because its class is annotated with Path.
The getCustomer method is a sub-resource locator method. The ShoppingStore. This method provides a Customer object that can service the request.
The http request will be dispatched to the Customer. Another example is:. In this request, again, first the ShoppingStore. A customer object is returned, and the rest of the request is dispatched to the Customer. Another interesting feature of Sub-resource locators is that the locator method result is dynamically processed at runtime to figure out how to dispatch the request.
So, the ShoppingStore. In the above example, getCustomer returns a java. Per request, at runtime, the JAX-RS server will figure out how to dispatch the request based on the object returned by getCustomer. What are the uses of this? Well, maybe you have a class hierarchy for your customers. Customer is the abstract base, CorporateCustomer and IndividualCustomer are subclasses. Your getCustomer method might be doing a Hibernate polymorphic query and doesn't know, or care, what concrete class is it querying for, or what it returns.
The HTTP protocol has built in content negotiation headers that allow the client and server to specify what content they are transferring and what content they would prefer to get. The server declares content preferences via the Produces and Consumes headers. Consumes is an array of media types that a particular resource or resource method consumes. When a client makes a request, JAX-RS first finds all methods that match the path, then, it sorts things based on the content-type header sent by the client.
So, if a client sent:. Now, if the client instead sends XML:. The Produces is used to map a client request and match it up to the client's Accept header. The Accept HTTP header is sent by the client and defines the media types the client prefers to receive from the server. Consumes and Produces can list multiple media types that they support. The client's Accept header can also send multiple types it might like to receive.
More specific media types are chosen first. The client Accept header or Produces Consumes can also specify weighted preferences that are used to match up requests with resource methods. This is best explained by RFC section Resteasy supports this complex way of doing content negotiation.
A variant in JAX-RS is a combination of media type, content-language, and content encoding as well as etags, last modified headers, and other preconditions. This is a more complex form of content negotiation that is done programmatically by the application developer using the javax.
Variant, VarianListBuilder, and Request objects. Request is injected via Context. Read the javadoc for more info on these. Some clients, like browsers, cannot use the Accept and Accept-Language headers to negotiation the representation's media type or language. RESTEasy allows you to map file name suffixes like. These file name suffixes take the place and override any Accept header sent by the client.
You configure this using the resteasy. Each mapping is delimited by a ':'. RESTEasy can do content negotiation based in a parameter in query string. To enable this, the web.
In cases where the request contains both the parameter and the Accept header, the parameter will be more relevant. It is possible to left the param-value empty, what will cause the processor to look for a parameter named 'accept'.
To do this, you annotate a class with Provider and specify the Produces types for a writer and Consumes types for a reader. Here is an example:. It is very useful, for instance, for implementing multipart providers.
Content types that embed other random content types. For example, the document. By default, Resteasy's built-in unmarshaller for org. Document documents will not expand external entities, replacing them by the empty string instead. It can be configured to replace external entities by values defined in the DTD by setting the context parameter. Another way of dealing with the problem is by prohibiting DTDs, which Resteasy does by default.
This behavior can be changed by setting the context parameter. Documents are also subject to Denial of Service Attacks when buffers are overrun by large entities or too many attributes. For example, if a DTD defined the following entities. By default, Resteasy will limit the number of expansions and the number of attributes per entity. The exact behavior depends on the underlying parser.
The limits can be turned off by setting the context parameter. For developers wishing to access the providers directly which most folks won't need to do , this document describes which provider is best suited for different configurations.
Additionally, the resource class or resource method will be annotated with either a Consumes or Produces annotation and contain one or more of the following values:. RESTEasy will select a different provider based on the return type or parameter type used in the resource. This section describes how the selection process works. This provider handles basic marshaling and unmarshalling of custom JAXB entities.
This is typically accomplished by invoking a method on the class which serves as the XmlRegistry and is named ObjectFactory. This provider simplifies this task by attempting to locate the XmlRegistry for the target class. By default, a JAXB implementation will create a class called ObjectFactory and is located in the same package as the target class. When this class is located, it will contain a "create" method that takes the object instance as a parameter.
For example, if the target type is called "Contact", then the ObjectFactory class will have a method:. The way it works is that you can write an annotation that can trigger the decoration of a Marshaller or Unmarshaller. Your decorators can do things like set Marshaller or Unmarshaller properties, set up validation, stuff like that.
Here's an example. Let's say we want to have an annotation that will trigger pretty-printing, nice formatting, of an XML document. Let's write a Marshaller decorator. To get this to work, we must annotate our Pretty annotation with a meta-annotation called Decorator. The processor attribute is a class we will write next. The processor implementation must implement the DecoratorProcessor interface and should also be annotated with DecorateTypes.
This annotation specifies what media types the processor can be used with. You must provide a Produces annotation to specify the media type the context is meant for. This helps the runtime match to the correct context resolver. You must also annotate the ContextResolver class with Provider. It has a few extra annotations that can help code your app. Resteasy provides the org. XmlHeader annotation for this. This header could also have been put on the Thing class to get the same result.
See the javadocs for more details on how you can use substitution values provided by resteasy. You can obtain more information about Jettison and how it works from:. To use this integration with Jettision you need to import the resteasy-jettison-provider Maven module.
Older versions of RESTEasy used to include this within the resteasy-jaxb-provider but we decided to modularize it more. Jettison has two mapping formats. The Mapped Convention is the default mapping. Here's an example of accessing the book in Javascript:. To use the BadgerFish Convention you must use the org. Notice that the XmlAttribute "title" is prefixed with the ' ' character.
This format is a bit simpler than the BadgerFish convention which is why it was chose as a default. Here's an example of accessing this in Javascript:. Mapped annotation. For example, if you defined your JAXB namespace within your package-info. To fix this problem you need another annotation, Mapped.
Fast infoset documents are faster to serialize and parse, and smaller in size, than logically equivalent XML documents. Thus, fast infoset documents may be used whenever the size and processing time of XML documents is an issue. To use this integration with Fastinfoset you need to import the resteasy-fastinfoset-provider Maven module. RESTEasy will automatically marshal arrays, java. Set's, and java.
The above resource can publish and receive JAXB objects. It is assumed that are wrapped in a collection element. You can change the namespace URI, namespace tag, and collection element name by using the org. Wrapped annotation on a parameter or method. Resteasy supports using collections with JSON. Your parameter or method return type must be a generic with a String as the key and the JAXB object's type. The above resource can publish and receive JAXB objects within a map. By default, they are wrapped in a "map" element in the default namespace.
Also, each "map" element has zero or more "entry" elements with a "key" attribute. You can change the namespace URI, namespace prefix and map, entry, and key element and attribute names by using the org. WrappedMap annotation on a parameter or method.
Resteasy supports using maps with JSON. If you have the resteasy-jackson-provider-xxx. Some objects models use abstract classes and interfaces heavily. Preventing the expansion of external entities is discussed in Section The same context parameter,. Section The context parameters. Feeds are composed of a number of items, known as "entries", each with an extensible set of attached metadata. For example, each entry has a title. The primary use case that Atom addresses is the syndication of Web content such as weblogs and news headlines to Web sites as well as directly to user agents.
Atom is the next-gen RSS feed. Although it is used primarily for the syndication of blogs and news, many are starting to use this format as the envelope for Web Services, for example, distributed notifications, job queues, or simply a nice format for sending or receiving data in bulk from a service.
The main classes are in the org. If you look at the source, you'd see that these are annotated with JAXB annotations. The distribution contains the javadocs for this project and are a must to learn the model. Here is a simple example of sending an atom feed using the Resteasy API. Content class allows you to unmarshal and marshal JAXB annotated objects that are the body of the content. Here's an example of sending an Entry with a Customer object attached as the body of the entry's content.
The Content. If you are using a different base format other than XML, i. Here is an example of an input atom document and extracting a Customer object from the content. Many users find the output from Jackson much nicer than the Badger format or Mapped format provided by Jettison.
Resteasy integrates with the JavaBean model. The resteasy-jackson-provider module, which is based on the outdated Jackson 1. The resteasy-jackson2-provider module is based on Jackson 2. If you're deploying Resteasy with WildFly 8, there's nothing you need to do except to make sure you've updated your installation with the latest and greatest Resteasy. If you're deploying Resteasy with WildFly 9 or above, there's nothing you need to do except to make sure you've updated your installation with the latest and greatest Resteasy.
This allows you to create json-based media types and still let Jackson marshal things for you. In this case, you must either not install the Jackson provider, or use the annotation org.
To turn off the JAXB json marshaller use the org. If the media type of the response is json and a callback query parameter is given, the response will be a javascript snippet with a method call of the method defined by the callback parameter. This supports the default behavior of jQuery. You can change the name of the callback parameter by setting the callbackQueryParameter property. Two steps are necessary to enable it:. If you are using the Jackson 2 provider, Resteasy has provided a pretty-printing annotation simliar with the one in JAXB provider:.
As the example shown above, the Formatted annotation will enable the underlying Jackson option "SerializationFeature. In Jackson2 , there is new feature JsonFilter to allow annotate class with JsonFilter and doing dynamic filtering. Here is an example which defines mapping from "nameFilter" to filter instances and filter bean properties when serilize to json format:. JsonFilter annotates resource class to filter out some property not to serialize in the json response. To map the filter id and instance we need to create another jackson class to add the id and filter instance map:.
Here the method modify will take care of filtering all properties except "name" property before write. To make this work, we need let Resteasy know this mapping info. This can be easily set either in a WriterInterceptor:. Resteasy get this modfiler from ThreadLocal variable and configure to modify ObjectWriter before write to response. What were they thinking?
Anyways, Resteasy has a provider for it. Otherwise, use this maven dependency. It should not conflict with Jackson or Jettison if you have that in your path too. The multipart mime format is used to pass lists of content bodies. Multiple content bodies are embedded in one message. The form-data format is the same as other multipart formats, except that each inlined piece of content has a name associated with it.
MultipartInput is a simple interface that allows you to get access to each part of the multipart message. Each part is represented by an InputPart interface.
Each part has a set of headers associated with it You can unmarshall the part by calling one of the getBody methods. The Type genericType parameter can be null, but the Class type parameter must be set.
Resteasy will find a MessageBodyReader based on the media type of the part as well as the type information you pass in. Sometimes you may want to unmarshall a body part that is sensitive to generic type metadata. In this case you can use the org. GenericType class. Here's an example of unmarshalling a type that is sensitive to generic type metadata.
Use of GenericType is required because it is really the only way to obtain generic type information at runtime. If your body parts are uniform, you do not have to manually unmarshall each and every part. You can just provide a java.
List as your input parameter. It must have the type it is unmarshalling with the generic parameter of the List type declaration. Here's an example again of unmarshalling a list of customers. The interface used for form-data input is org. With form-data, if your body parts are uniform, you do not have to manually unmarshall each and every part.
Map as your input parameter. The parts are identified by their "Content-ID" headers. The interface used for related input is org. When you want to output multipart data it is as simple as creating a MultipartOutput object and calling addPart methods. Resteasy will automatically find a MessageBodyWriter to marshall your entity objects. Like MultipartInput, sometimes you may have marshalling which is sensitive to generic type metadata.
In that case, use GenericType. Most of the time though passing in an Object and its MediaType is enough. If your body parts are uniform, you do not have to manually marshall each and every part or even use a MultipartOutput object..
It must have the generic type it is marshalling with the generic parameter of the List type declaration. You must also annotate the method with the PartType annotation to specify what media type each part is. Here's an example of sending back a list of customers back to a client. The customers are JAXB objects.
If your body parts are uniform, you do not have to manually marshall each and every part or even use a MultipartFormDataOutput object.. It must have the generic type it is marshalling with the generic parameter of the Map type declaration.
We are sending a html with 2 images. These FormParams must also be annotated with org. PartType if you are doing output.
You can also use the same object to receive multipart data. Here is an example of the server side counterpart of our customer portal. What does this mean? If you have a JAXB annotated POJO that also holds some binary content you may choose to send it in such a way where the binary does not need to be encoded in any way neither base64 neither hex.
This results in faster transport while still using the convenient POJO. Now lets see an example:. In the above POJO myBinary and myDataHandler will be processed as binary attachments while the whole Xop object will be sent as xml in the places of the binaries only their references will be generated. DataHandler is the most general supported type so if you need an java. InputStream or a javax. DataSource you need to go with the DataHandler.
Some other special types are supported too: java. Image and javax. Now lets see a an example Java client that sends this:. We used Consumes MultipartConstants. So we have a POJO and a client service that is willing to send it. All we need now a server that can read it:. Of course we could also produce Xop return values but we would than also need to annotate that and use a Produce annotation, too.
There are a lot of frameworks doing multipart parsing automatically with the help of filters and interceptors. Like org. MultipartFilter in Seam or org.
MultipartResolver in Spring. However the incoming multipart request stream can be parsed only once.
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