小贝子编程

OSGi、泽西岛和"No message body writer has been found for class"



我正在整理一个简短的OSGi R7，OpenAPI和jsonSchema的REST演示。一切正常，除了邮递员给出以下错误：

No message body writer has been found for class com.ovloop.masterdata.party.pojo.provider.Person, ContentType: application/json

我实现 Restful 服务的类编写如下。 顺便说一句，我可以在此类上运行 swagger-maven-plugin 并获得相应的 Swagger 规范。

package com.xyz.masterdata.party.rest;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.http.whiteboard.propertytypes.HttpWhiteboardResource;
import org.osgi.service.jaxrs.whiteboard.propertytypes.JaxrsResource;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.xyz.masterdata.party.pojo.provider.Person;
import io.swagger.v3.oas.annotations.OpenAPIDefinition;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.info.Info;
import io.swagger.v3.oas.annotations.tags.Tag;
import io.swagger.v3.oas.annotations.tags.Tags;
@JaxrsResource
@HttpWhiteboardResource(pattern = { "" }, prefix = "")
@Path("/person")
@Tags(@Tag(name = "test", description = ""))
@OpenAPIDefinition(info = @Info(description = "Person Service", version = "1.0", title = ""))
@Component(service = PersonRestImpl.class, immediate = true, property = { "service.exported.interfaces=*",
"service.intents=osgi.async", "service.intents=jaxrs", "osgi.basic.timeout=50000" })
public class PersonRestImpl {
@GET
@Path("/person")
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Get person with key", description = "Get person with key")
public Person getPerson(@PathParam("person") Long personId) {
Person person = new Person();
person.setPersonId("3245234");
person.setFirstName("Tom");
person.setLastName("Petty");
person.setAge(65);
return person;
}
@GET
@Path("/persons")
@Operation(summary = "Get persons", description = "Get list of persons")
public Response getPersons() {
Person person = new Person();
person.setPersonId("3245234");
person.setFirstName("Tom");
person.setLastName("Petty");
person.setAge(65);
List<Person> persons = new ArrayList<Person>();
persons.add(person);
Gson jsonConverter = new GsonBuilder().create();
return Response.status(Status.ACCEPTED).entity(jsonConverter.toJson(persons)).build();
}
@DELETE
@Path("/delete")
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "delete person", description = "delete person")
public boolean deletePerson(@PathParam("person") long personId) {
return true;
}
@POST
@Path("/create")
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Create Person", description = "Create Person")
public Person postPerson(Person person) {
//      if (person.personId > 0) {
//          personDao.update(person);
//          return person;
//      } else {
//          long id = personDao.save(person);
//          person.personId = 1;
//          return person;
//      }
return person;
}
}

我的POJO是使用jsonschema2pojo-maven-plugin从jsonSchema生成的，如下所示：

package com.xyz.masterdata.party.pojo.provider;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyDescription;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;

/**
* Person
* <p>
* 
* 
*/
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({
"personId",
"age",
"fullName",
"firstName",
"lastName"
})
public class Person {
/**
* 
* (Required)
* 
*/
@JsonProperty("personId")
private String personId;
/**
* Age in years
* 
*/
@JsonProperty("age")
@JsonPropertyDescription("Age in years")
private Integer age;
/**
* 
* (Required)
* 
*/
@JsonProperty("fullName")
private String fullName;
@JsonProperty("firstName")
private String firstName;
@JsonProperty("lastName")
private String lastName;
@JsonIgnore
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
/**
* 
* (Required)
* 
*/
@JsonProperty("personId")
public String getPersonId() {
return personId;
}
/**
* 
* (Required)
* 
*/
@JsonProperty("personId")
public void setPersonId(String personId) {
this.personId = personId;
}
public Person withPersonId(String personId) {
this.personId = personId;
return this;
}
/**
* Age in years
* 
*/
@JsonProperty("age")
public Integer getAge() {
return age;
}
/**
* Age in years
* 
*/
@JsonProperty("age")
public void setAge(Integer age) {
this.age = age;
}
public Person withAge(Integer age) {
this.age = age;
return this;
}
/**
* 
* (Required)
* 
*/
@JsonProperty("fullName")
public String getFullName() {
return fullName;
}
/**
* 
* (Required)
* 
*/
@JsonProperty("fullName")
public void setFullName(String fullName) {
this.fullName = fullName;
}
public Person withFullName(String fullName) {
this.fullName = fullName;
return this;
}
@JsonProperty("firstName")
public String getFirstName() {
return firstName;
}
@JsonProperty("firstName")
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public Person withFirstName(String firstName) {
this.firstName = firstName;
return this;
}
@JsonProperty("lastName")
public String getLastName() {
return lastName;
}
@JsonProperty("lastName")
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Person withLastName(String lastName) {
this.lastName = lastName;
return this;
}
@JsonAnyGetter
public Map<String, Object> getAdditionalProperties() {
return this.additionalProperties;
}
@JsonAnySetter
public void setAdditionalProperty(String name, Object value) {
this.additionalProperties.put(name, value);
}
public Person withAdditionalProperty(String name, Object value) {
this.additionalProperties.put(name, value);
return this;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(Person.class.getName()).append('@').append(Integer.toHexString(System.identityHashCode(this))).append('[');
sb.append("personId");
sb.append('=');
sb.append(((this.personId == null)?"<null>":this.personId));
sb.append(',');
sb.append("age");
sb.append('=');
sb.append(((this.age == null)?"<null>":this.age));
sb.append(',');
sb.append("fullName");
sb.append('=');
sb.append(((this.fullName == null)?"<null>":this.fullName));
sb.append(',');
sb.append("firstName");
sb.append('=');
sb.append(((this.firstName == null)?"<null>":this.firstName));
sb.append(',');
sb.append("lastName");
sb.append('=');
sb.append(((this.lastName == null)?"<null>":this.lastName));
sb.append(',');
sb.append("additionalProperties");
sb.append('=');
sb.append(((this.additionalProperties == null)?"<null>":this.additionalProperties));
sb.append(',');
if (sb.charAt((sb.length()- 1)) == ',') {
sb.setCharAt((sb.length()- 1), ']');
} else {
sb.append(']');
}
return sb.toString();
}
@Override
public int hashCode() {
int result = 1;
result = ((result* 31)+((this.firstName == null)? 0 :this.firstName.hashCode()));
result = ((result* 31)+((this.lastName == null)? 0 :this.lastName.hashCode()));
result = ((result* 31)+((this.fullName == null)? 0 :this.fullName.hashCode()));
result = ((result* 31)+((this.personId == null)? 0 :this.personId.hashCode()));
result = ((result* 31)+((this.additionalProperties == null)? 0 :this.additionalProperties.hashCode()));
result = ((result* 31)+((this.age == null)? 0 :this.age.hashCode()));
return result;
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
}
if ((other instanceof Person) == false) {
return false;
}
Person rhs = ((Person) other);
return (((((((this.firstName == rhs.firstName)||((this.firstName!= null)&&this.firstName.equals(rhs.firstName)))&&((this.lastName == rhs.lastName)||((this.lastName!= null)&&this.lastName.equals(rhs.lastName))))&&((this.fullName == rhs.fullName)||((this.fullName!= null)&&this.fullName.equals(rhs.fullName))))&&((this.personId == rhs.personId)||((this.personId!= null)&&this.personId.equals(rhs.personId))))&&((this.additionalProperties == rhs.additionalProperties)||((this.additionalProperties!= null)&&this.additionalProperties.equals(rhs.additionalProperties))))&&((this.age == rhs.age)||((this.age!= null)&&this.age.equals(rhs.age))));
}
}

我在应用程序项目上的 bndrun 文件如下所示：

-runfw: org.eclipse.osgi;version=3.13
-runee: JavaSE-1.8
-runprovidedcapabilities: ${native_capability}
-resolve.effective: active
-runproperties: 
osgi.console=,
osgi.console.enable.builtin=false
-runrequires: 
osgi.identity;filter:='(osgi.identity=org.apache.felix.gogo.shell)',
osgi.identity;filter:='(osgi.identity=org.apache.felix.gogo.command)',
osgi.identity;filter:='(osgi.identity=com.xyz.masterdata.application.services)',
bnd.identity;id='com.fasterxml.jackson.jaxrs.jackson-jaxrs-json-provider',
bnd.identity;id='com.fasterxml.jackson.jaxrs.jackson-jaxrs-base',
bnd.identity;id='com.fasterxml.jackson.core.jackson-databind',
bnd.identity;id='com.fasterxml.jackson.core.jackson-core',
bnd.identity;id='com.xyz.masterdata.party.rest',
bnd.identity;id='com.xyz.masterdata.party.pojo.provider'
-runbundles: 
com.xyz.masterdata.application.services;version=snapshot,
com.xyz.masterdata.party.rest;version=snapshot,
com.xyz.masterdata.party.pojo.provider;version=snapshot,
org.apache.felix.configadmin;version='[1.9.8,1.9.9)',
org.apache.felix.configurator;version='[1.0.6,1.0.7)',
org.apache.felix.scr;version='[2.1.10,2.1.11)',
ch.qos.logback.classic;version='[1.2.3,1.2.4)',
ch.qos.logback.core;version='[1.2.3,1.2.4)',
org.apache.aries.javax.jax.rs-api;version='[1.0.0,1.0.1)',
org.apache.aries.jax.rs.whiteboard;version='[1.0.1,1.0.2)',
org.apache.felix.gogo.runtime;version='[1.0.10,1.0.11)',
org.apache.felix.http.jetty;version='[4.0.6,4.0.7)',
org.apache.felix.http.servlet-api;version='[1.1.2,1.1.3)',
org.apache.servicemix.specs.annotation-api-1.3;version='[1.3.0,1.3.1)',
org.osgi.service.jaxrs;version='[1.0.0,1.0.1)',
org.osgi.util.function;version='[1.1.0,1.1.1)',
org.osgi.util.promise;version='[1.1.0,1.1.1)',
slf4j.api;version='[1.7.25,1.7.26)',
org.apache.felix.gogo.command;version='[1.0.2,1.0.3)',
org.apache.felix.gogo.shell;version='[1.0.0,1.0.1)',
io.swagger.core.v3.swagger-annotations;version='[2.0.7,2.0.8)',
com.google.gson;version='[2.8.5,2.8.6)',
com.fasterxml.jackson.core.jackson-annotations;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.core.jackson-core;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.core.jackson-databind;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.jaxrs.jackson-jaxrs-base;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.jaxrs.jackson-jaxrs-json-provider;version='[2.9.8, 2.9.9)'

但是，如上所述，在运行这个简单的应用程序时，Postman 在调用 getPerson 方法时给了我以下错误：

No message body writer has been found for class com.ovloop.masterdata.party.pojo.provider.Person, ContentType: application/json

但是当我将响应类型从"人员"替换为"响应"并手动生成 JSON 时，一切正常：

@GET
@Path("/person")
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Get person with key", description = "Get person with key")
public Response getPerson(@PathParam("person") Long personId) {
Person person = new Person();
person.setPersonId("3245234");
person.setFirstName("Tom");
person.setLastName("Petty");
person.setAge(65);
Gson jsonConverter = new GsonBuilder().create();
return Response.status(Status.ACCEPTED).entity(jsonConverter.toJson(person)).build();
}

不幸的是，这会将 Person 数据类型排除在我生成的 swagger 规范之外，这并不好。

所以我的问题是如何在OSGi应用程序中为自定义POJO注册消息正文编写器？

提前感谢您的反馈，

兰迪

Paul 提到注册一个 JacksonJsonProvider。 我的印象是添加 fasterxml 的杰克逊提供程序作为所需的捆绑包可以解决问题。 相反，我把它换成了org.apache.aries.jax.rs.jackson，这一切都奏效了。

以下是我更新的 bndrun 文件：

-runfw: org.eclipse.osgi;version=3.13
-runee: JavaSE-1.8
-runprovidedcapabilities: ${native_capability}
-resolve.effective: active
-runproperties: 
osgi.console=,
org.osgi.service.http.port=6000,
osgi.console.enable.builtin=false
-runrequires: 
osgi.identity;filter:='(osgi.identity=org.apache.felix.gogo.shell)',
osgi.identity;filter:='(osgi.identity=org.apache.felix.gogo.command)',
bnd.identity;id='org.apache.aries.jax.rs.jackson',
bnd.identity;id='org.apache.aries.jax.rs.jaxb.json',
bnd.identity;id='com.xyz.masterdata.party.rest',
bnd.identity;id='com.xyz.masterdata.party.pojo.provider',
bnd.identity;id='com.xyz.masterdata.application.services'
-runbundles: 
com.xyz.masterdata.party.rest;version=snapshot,
com.xyz.masterdata.party.pojo.provider;version=snapshot,
org.apache.felix.configadmin;version='[1.9.8,1.9.9)',
org.apache.felix.scr;version='[2.1.10,2.1.11)',
ch.qos.logback.classic;version='[1.2.3,1.2.4)',
ch.qos.logback.core;version='[1.2.3,1.2.4)',
org.apache.aries.javax.jax.rs-api;version='[1.0.0,1.0.1)',
org.apache.aries.jax.rs.whiteboard;version='[1.0.1,1.0.2)',
org.apache.felix.gogo.runtime;version='[1.0.10,1.0.11)',
org.apache.felix.http.jetty;version='[4.0.6,4.0.7)',
org.apache.felix.http.servlet-api;version='[1.1.2,1.1.3)',
org.apache.servicemix.specs.annotation-api-1.3;version='[1.3.0,1.3.1)',
org.osgi.service.jaxrs;version='[1.0.0,1.0.1)',
org.osgi.util.function;version='[1.1.0,1.1.1)',
org.osgi.util.promise;version='[1.1.0,1.1.1)',
slf4j.api;version='[1.7.25,1.7.26)',
org.apache.felix.gogo.command;version='[1.0.2,1.0.3)',
org.apache.felix.gogo.shell;version='[1.0.0,1.0.1)',
io.swagger.core.v3.swagger-annotations;version='[2.0.7,2.0.8)',
com.fasterxml.jackson.core.jackson-annotations;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.core.jackson-core;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.core.jackson-databind;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.jaxrs.jackson-jaxrs-base;version='[2.9.8,2.9.9)',
com.fasterxml.jackson.jaxrs.jackson-jaxrs-json-provider;version='[2.9.8,2.9.9)',
com.xyz.masterdata.application.services;version=snapshot,
org.apache.felix.configurator;version='[1.0.6,1.0.7)',
com.fasterxml.jackson.module.jackson-module-jaxb-annotations;version='[2.9.8,2.9.9)',
org.apache.aries.jax.rs.jackson;version='[1.0.2,1.0.3)',
javax.json-api;version='[1.1.4,1.1.5)',
org.apache.cxf.cxf-core;version='[3.3.1,3.3.2)',
org.apache.cxf.cxf-rt-frontend-jaxrs;version='[3.3.1,3.3.2)',
org.apache.cxf.cxf-rt-security;version='[3.3.1,3.3.2)',
org.apache.cxf.cxf-rt-transports-http;version='[3.3.1,3.3.2)',
org.apache.ws.xmlschema.core;version='[2.2.4,2.2.5)',
org.apache.aries.jax.rs.jaxb.json;version='[1.0.0,1.0.1)'

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