i'm trying to save entity in cosmos db through spring boot micro service. I'm not getting any error, only 1 warning '[osEventLoop-6-1] c.a.d.c.i.d.rntbd.RntbdRequestManager : ChannelHandlerContext(RntbdRequestManager#0, [id: 0x999bfbac, L:0.0.0.0/0.0.0.0:56979 ! R:cdb-ms-prod-*****-****.documents.azure.com/********]) channelUnregistered exceptionally'
but data is not getting saved in cosmos db. i'm using reactivecosmosrepository.
here is my pom.xml
<properties>
<java.version>1.8</java.version>
<azure.version>2.2.0</azure.version>
</properties>
<dependency>
<groupId>com.microsoft.azure</groupId>
<artifactId>azure-cosmosdb-spring-boot-starter</artifactId>
<version>${azure.version}</version>
</dependency>
my entity
import com.microsoft.azure.spring.data.cosmosdb.core.mapping.Document;
#Document(collection = "dashboardsnapshot")
public class DashboardSnapshot {
private String id;
private String clientId;
private String snapshotJSON;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getClientId() {
return clientId;
}
public void setClientId(String clientId) {
this.clientId = clientId;
}
public String getSnapshotJSON() {
return snapshotJSON;
}
public void setSnapshotJSON(String snapshotJSON) {
this.snapshotJSON = snapshotJSON;
}
#Override
public String toString() {
return "DashboardSnapshot [id=" + id + ", clientId=" + clientId + ", snapshotJSON=" + snapshotJSON + "]";
}
}
my repository
import org.springframework.stereotype.Repository;
import com.ka.concept.dashboardconfig.entity.DashboardSnapshot;
import com.microsoft.azure.spring.data.cosmosdb.repository.ReactiveCosmosRepository;
import reactor.core.publisher.Flux;
#Repository
public interface SnapshotDao extends ReactiveCosmosRepository<DashboardSnapshot, String>{
Flux<DashboardSnapshot> findbyClientId(String ClientId);
}
my service
#Service
public class SnapshotServiceImpl implements SnapshotService{
#Autowired
public SnapshotDao snapshotdao;
#Override
public boolean saveSnapshotConfig(DashboardSnapshot snapshotJSON) {
// TODO Auto-generated method stub
snapshotdao.save(snapshotJSON);
return true;
}
}
#AksYou should call subscribe(). The publisher does not do anything till some one subscribes.
snapshotdao.save(snapshotJSON).subscribe();
I am having a hard time configuring transactional support in spring-boot 2.0.3 with AspectJ LTW (load-time weaving). My spring-boot is running embedded Tomcat servlet container. In my persistence layer, I am not using JPA, but Spring JDBC Template instead.
I opted for AspectJ mode for transaction management because we are leveraging a rather big project with nested transactions and sometimes it is hard to keep track of all the applications of #Transactional annotation. So that when this annotation is being used I want to have a predictable result - atomic DB operation. I do not want to think about whether we have a self-invocation or method that is marked to be transactional is public.
I have read a bunch of documentation regarding transaction support in spring and how to configure LTW AspectJ weaving.
Unfortunately, I cannot make it work. I have created a test (spring-boot test class) that is meant to mimic different failures in a code that should be transactional (see it below). Also, I cannot see the weaving actually happening. I am clearly missing something, cannot figure out what.
My test class:
#RunWith(SpringRunner.class)
#SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = TestConfig.class)
#ActiveProfiles("TEST")
public class TransactionalIT {
#SpyBean
private JdbcTemplate jdbcTemplate;
// we need this guy in order to perform a cleanup in static #AfterClass method
private static JdbcTemplate jdbcTemplateInStaticContext;
#Autowired
private PlatformTransactionManager txManager;
#Spy
private NestedTransactionsJdbcDao dao;
#Before
public void setUp() {
if (jdbcTemplateInStaticContext == null) {
// Making sure we're working with the proper tx manager
assertThat(txManager).isNotNull();
assertThat(txManager.getClass()).isEqualTo(DataSourceTransactionManager.class);
jdbcTemplateInStaticContext = jdbcTemplate;
jdbcTemplateInStaticContext.execute("CREATE TABLE entity_a (id varchar(12) PRIMARY KEY, name varchar(24), description varchar(255));");
jdbcTemplateInStaticContext.execute("CREATE TABLE entity_b (id varchar(12) PRIMARY KEY, name varchar(24), description varchar(255));");
jdbcTemplateInStaticContext.execute("CREATE TABLE entity_a_to_b_assn (entity_a_id varchar(12) NOT NULL, entity_b_id varchar(12) NOT NULL, " +
"CONSTRAINT fk_entity_a FOREIGN KEY (entity_a_id) REFERENCES entity_a(id), " +
"CONSTRAINT fk_entity_b FOREIGN KEY (entity_b_id) REFERENCES entity_b(id), " +
"UNIQUE (entity_a_id, entity_b_id));");
}
}
#AfterClass
public static void cleanup() {
if (jdbcTemplateInStaticContext != null) {
jdbcTemplateInStaticContext.execute("DROP TABLE entity_a_to_b_assn;");
jdbcTemplateInStaticContext.execute("DROP TABLE entity_a;");
jdbcTemplateInStaticContext.execute("DROP TABLE entity_b;");
}
}
#Test
public void createObjectGraph_FailsDuring_AnAttemptToCreate3rdEntityA() {
doThrow(new RuntimeException("blah!")).when(jdbcTemplate).update(eq("INSERT INTO entity_a (id, name, description) VALUES(?, ?, ?);"),
eq("a3"), eq("entity a3"), eq("descr_a_3"));
try {
dao.createObjectGraph(getObjectGraph());
fail("Should never reach this point");
} catch (RuntimeException e) {
assertThat(e.getMessage()).isEqualTo("blah!");
assertDbCounts(0L, 0L, 0L);
}
}
private void assertDbCounts(long expectedACount, long expectedBCount, long expectedAToBCount) {
Long actualACount = jdbcTemplate.queryForObject("SELECT count(*) count_a FROM entity_a", new LongRowMapper());
assertThat(actualACount).isEqualTo(expectedACount);
Long actualBCount = jdbcTemplate.queryForObject("SELECT count(*) count_b FROM entity_b", new LongRowMapper());
assertThat(actualBCount).isEqualTo(expectedBCount);
Long actualAToBCount = jdbcTemplate.queryForObject("SELECT count(*) count_a_to_b FROM entity_b", new LongRowMapper());
assertThat(actualAToBCount).isEqualTo(expectedAToBCount);
}
private final class LongRowMapper implements RowMapper<Long> {
#Override
public Long mapRow(ResultSet resultSet, int i) throws SQLException {
return resultSet.getLong(1);
}
}
private ObjectGraph getObjectGraph() {
EntityA a1 = new EntityA("a1", "entity a1", "descr_a_1");
EntityA a2 = new EntityA("a2", "entity a2", "descr_a_2");
EntityA a3 = new EntityA("a3", "entity a3", "descr_a_3");
EntityB b1 = new EntityB("b1", "entity b1", "descr_b_1");
EntityB b2 = new EntityB("b2", "entity b2", "descr_b_2");
EntityB b3 = new EntityB("b3", "entity b3", "descr_b_3");
AtoBAssn a1b1 = new AtoBAssn("a1", "b1");
AtoBAssn a1b3 = new AtoBAssn("a1", "b3");
AtoBAssn a2b2 = new AtoBAssn("a2", "b2");
AtoBAssn a2b3 = new AtoBAssn("a2", "b3");
AtoBAssn a3b1 = new AtoBAssn("a3", "b1");
return new ObjectGraph(
Lists.newArrayList(a1, a2, a3),
Lists.newArrayList(b1, b2, b3),
Lists.newArrayList(a1b1, a1b3, a2b2, a2b3, a3b1));
}
#Data
#AllArgsConstructor
private class EntityA {
private String id;
private String name;
private String description;
}
#Data
#AllArgsConstructor
private class EntityB {
private String id;
private String name;
private String description;
}
#Data
#AllArgsConstructor
private class AtoBAssn {
private String idA;
private String idB;
}
#Data
#AllArgsConstructor
private class ObjectGraph {
private List<EntityA> aList;
private List<EntityB> bList;
List<AtoBAssn> aToBAssnList;
}
#Repository
public class NestedTransactionsJdbcDao {
#Transactional
public void createObjectGraph(ObjectGraph og) {
createEntitiesA(og.getAList());
createEntitiesB(og.getBList());
createAtoBAssn(og.getAToBAssnList());
doSomethingElse();
}
#Transactional
public void createEntitiesA(List<EntityA> aList) {
aList.forEach(a ->
jdbcTemplate.update("INSERT INTO entity_a (id, name, description) VALUES(?, ?, ?);",
a.getId(), a.getName(), a.getDescription()));
}
#Transactional
public void createEntitiesB(List<EntityB> bList) {
bList.forEach(b ->
jdbcTemplate.update("INSERT INTO entity_b (id, name, description) VALUES(?, ?, ?);",
b.getId(), b.getName(), b.getDescription()));
}
#Transactional
/**
* Intentionally access is set to package-private
*/
void createAtoBAssn(List<AtoBAssn> aToBAssnList) {
aToBAssnList.forEach(aToB ->
jdbcTemplate.update("INSERT INTO entity_a_to_b_assn (entity_a_id, entity_b_id) VALUES(?, ?);",
aToB.getIdA(), aToB.getIdB()));
}
void doSomethingElse() {
// Intentionally left blank
}
}
}
Here is my configuration class:
import org.apache.catalina.loader.WebappClassLoader;
import org.springframework.context.annotation.AdviceMode;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableLoadTimeWeaving;
import org.springframework.context.annotation.Primary;
import org.springframework.instrument.classloading.LoadTimeWeaver;
import org.springframework.instrument.classloading.tomcat.TomcatLoadTimeWeaver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.aspectj.AnnotationTransactionAspect;
#Configuration
#EnableTransactionManagement(mode = AdviceMode.ASPECTJ)
#EnableLoadTimeWeaving(aspectjWeaving = EnableLoadTimeWeaving.AspectJWeaving.ENABLED)
public class EventCoreConfig {
#Bean
public LoadTimeWeaver loadTimeWeaver() {
// https://tomcat.apache.org/tomcat-8.0-doc/api/org/apache/tomcat/InstrumentableClassLoader.html
return new TomcatLoadTimeWeaver(new WebappClassLoader());
}
#Bean
#Primary
public PlatformTransactionManager txManager(DataSource dataSource) {
DataSourceTransactionManager txManager = new DataSourceTransactionManager(dataSource);
AnnotationTransactionAspect aspect = new AnnotationTransactionAspect();
aspect.setTransactionManager(txManager);
return txManager;
}
}
Here is the portion of my pom.xml that is adding dependencies of interest:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>ch.vorburger.mariaDB4j</groupId>
<artifactId>mariaDB4j</artifactId>
<version>2.4.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mariadb.jdbc</groupId>
<artifactId>mariadb-java-client</artifactId>
<version>2.4.0</version>
<scope>test</scope>
</dependency>
Any help will be greatly appreciated. I know this is a little advanced topic, but I do not think it should be that complicated. I think Spring's documentation lacks examples of how to properly perform this kind of configuration. Also, I haven't found any success stories over there with a similar setup.
I'm working on a service which accepts a DTO in a POST method and creates an entity based on that DTO. Nested inside is a multipart file, which is going to be an image used by the entity that will be created.
Using postman to test my backend, I keep receiving an seemingly empty DTO. The three logs inside the controller return null, 0 and null respectively.
This is how I setup my data, which I am quite sure is the problem:
I converted my image into a base64 string, which as far as I know is the only way I can post a nested image.
Code
Controller
#PostMapping(consumes = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<InventoryComponentDto> create(#ModelAttributee InventoryComponentDto request) {
System.out.println(request.getDescription());
System.out.println(request.getMinimal_supply());
System.out.println(request.getComponent());
InventoryComponentDto result = inventoryComponentService.create(request);
if (result == null) {
return new ResponseEntity<>(null, HttpStatus.BAD_REQUEST);
}
return ResponseEntity.ok(result);
}
InventoryComponentDto
public class InventoryComponentDto {
private ComponentDto component;
private String description;
private Date createdAt;
private Date updatedAt;
private int minimal_supply;
private int supply;
}
ComponentDto
public class ComponentDto {
private Long id;
private int number;
private String name;
private FileDto image;
}
FileDto
public class FileDto {
private String name;
private String type;
private String url;
private MultipartFile data;
}
What would be the way for me to adequately create my dto in postman, including an image?
Update
"status": 400,
"error": "Bad Request",
"message": "JSON parse error: (was java.lang.NullPointerException); nested exception is com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: com.package.MCI.dto.InventoryComponentDto[\"component\"]->com.package.MCI.dto.ComponentDto[\"image\"])",
"trace": "org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: (was java.lang.NullPointerException); nested...
You need to create a custom jackson deserializer.
//CustomDeserializer
import java.io.IOException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.springframework.util.Base64Utils;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
public class CustomDeserializer extends StdDeserializer<FileDTO> {
public CustomDeserializer() {
super(FileDTO.class);
}
protected CustomDeserializer(Class<?> vc) {
super(vc);
}
#Override
public FileDTO deserialize(JsonParser jsonParser,
DeserializationContext deserializationContext)
throws IOException, JsonProcessingException {
JsonNode node = jsonParser.getCodec().readTree(jsonParser);
String name = node.get("name").asText();
String url = node.get("url").asText();
String type = "." + node.get("type").asText();
String fileBase64 = node.get("data").asText();
byte[] fileBytes = Base64Utils.decodeFromString(fileBase64);
FileItem fileItem = new DiskFileItem(name, "image/jpg", false, name + type,
fileBytes.length, null);
fileItem.getOutputStream().write(fileBytes);
fileItem.getOutputStream().flush();
MultipartFile file = new CommonsMultipartFile(fileItem);
fileItem.getOutputStream().close();
FileDTO fileDTO = new FileDTO();
fileDTO.setName(name);
fileDTO.setUrl(url);
fileDTO.setType(type);
fileDTO.setData(file);
return fileDTO;
}
}
And use it like:
//FileDTO
#JsonDeserialize(using = CustomDeserializer.class)
public class FileDTO {
You need these two dependencies:
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
I have a simple table "employee" defined as:
create table employee (id int, name varchar2(40));
I want to write an application to insert values in it and commit only after all values are inserted. Here is my code:
Employee.java:
package com.empl;
public class Employee {
private int id;
private String name;
public void setId(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
EmployeeDAO.java:
package com.empl;
import javax.sql.DataSource;
public interface EmployeeDAO {
public void setDataSource(DataSource dataSource);
public void create(int id, String name);
}
EmployeeJDBCTemplate.java:
package com.empl;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
public class EmployeeJDBCTemplate {
private DataSource dataSource;
private JdbcTemplate jdbcTemplateObject;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplateObject = new JdbcTemplate(dataSource);
}
public DataSource getDataSource() {
return dataSource;
}
public void create(int id, String name) {
String SQL = "insert into employee (id, name) values (?, ?)";
jdbcTemplateObject.update(SQL, id, name);
}
}
MainApp.java:
package com.empl;
import java.sql.SQLException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MainApp {
public static void main(String args[]) throws SQLException {
ApplicationContext context = new
ClassPathXmlApplicationContext("Beans.xml");
EmployeeJDBCTemplate employeeJDBCTemplate =
(EmployeeJDBCTemplate) context.getBean("employeeJDBCTemplate");
employeeJDBCTemplate.getDataSource().getConnection().
setAutoCommit(false);
employeeJDBCTemplate.create(1, "E1");
employeeJDBCTemplate.create(2, "E2");
}
}
Beans.xml:
<beans xmlns = "http://www.springframework.org/schema/beans"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation = "http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd ">
<bean id = "dataSource" class =
"org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name = "driverClassName" value =
"oracle.jdbc.driver.OracleDriver"></property>
<property name = "url" value =
"jdbc:oracle:thin:#localhost:1521/xe"></property>
<property name = "username" value = "sys as sysdba"></property>
<property name = "password" value = "pass"></property>
</bean>
<bean id = "employeeJDBCTemplate" class =
"com.empl.EmployeeJDBCTemplate">
<property name = "dataSource" ref = "dataSource"></property>
</bean>
</beans>
I executed the code but when I enter SQLPlus and type the rollback; command, the records are still in the table.
I saw related questions but nothing seems to work.
I have an implementation of a REST front-end UI and a Spring JPA based backend.
In it, I have a class like this:
public class TaskInfo {
// 4 fields
private Parent parentList;
// 3 fields
// Getters and Setters
}
class Parent {
// Parent class code
}
When I try to take a Response, I find that in place of Parent, I get a null value. Why is this Parent object not getting serialized? Is there a workaround to this? Or should I just include the fields of Parent in this class directly?
Edit: I'm using Jackson for serialization.
For me the below works fine. I think this is equivalent to the code present in your question
package jackson;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
public class TaskInfo {
public TaskInfo(String id, Parent parentList) {
super();
this.id = id;
this.parentList = parentList;
}
private String id;
private Parent parentList;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public Parent getParentList() {
return parentList;
}
public void setParentList(Parent parentList) {
this.parentList = parentList;
}
public static void main(String args[]) throws IOException {
Parent parent = new Parent("123");
TaskInfo taskInfo = new TaskInfo("taskID", parent);
String json = new ObjectMapper().writeValueAsString(taskInfo);
System.out.println(json);
}
}
class Parent {
public Parent(String parentId) {
this.parentId = parentId;
}
public String getParentId() {
return parentId;
}
public void setParentId(String parentId) {
this.parentId = parentId;
}
private String parentId;
// Parent class code
}
It prints the following output
{"id":"taskID","parentList":{"parentId":"123"}}
I used jackson
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.1</version>
</dependency>
It doesn't serialize because your properties are not public. Make the properties public and it works.