spring – Pupli

Spring CORS No ‘Access-Control-Allow-Origin’ header is present

Posted on June 30, 2018 by Mahmood

Enabling CORS for the whole application is as simple as:

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**");
    }
}

@Configuration

@EnableWebMvc

public class WebConfig extends WebMvcConfigurerAdapter {

@Override

public void addCorsMappings(CorsRegistry registry) {

registry.addMapping("/**");

}

To enable CORS for the whole controller:

@CrossOrigin(origins = "http://domain2.com", maxAge = 3600)
@RestController
@RequestMapping("/account")
public class AccountController {

    @RequestMapping("/{id}")
    public Account retrieve(@PathVariable Long id) {
        // ...
    }

    @RequestMapping(method = RequestMethod.DELETE, path = "/{id}")
    public void remove(@PathVariable Long id) {
        // ...
    }
}

@CrossOrigin(origins = "http://domain2.com", maxAge = 3600)

@RestController

@RequestMapping("/account")

public class AccountController {

@RequestMapping("/{id}")

public Account retrieve(@PathVariable Long id) {

// ...

}

@RequestMapping(method = RequestMethod.DELETE, path = "/{id}")

public void remove(@PathVariable Long id) {

// ...

}

To enable CORS for the method: […]

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Scheduling in Spring with Quartz

Posted on June 9, 2018 by Mahmood

@Component
public class SampleJob implements Job {
 
    @Autowired
    private SampleJobService jobService;
 
    public void execute(JobExecutionContext context) throws JobExecutionException {
        jobService.executeSampleJob();
    }
}

@Component

public class SampleJob implements Job {

@Autowired

private SampleJobService jobService;

public void execute(JobExecutionContext context) throws JobExecutionException {

jobService.executeSampleJob();

}

References http://www.baeldung.com/spring-quartz-schedule

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Post JSON to spring REST webservice

Posted on December 15, 2017 by Mahmood

@RequestMapping(value = "/", method = RequestMethod.POST)
public ResponseEntity<Car> update(@RequestBody Car car) {
    ...
}

@RequestMapping(value = "/", method = RequestMethod.POST)

public ResponseEntity<Car> update(@RequestBody Car car) {

...

}

References https://www.leveluplunch.com/java/tutorials/014-post-json-to-spring-rest-webservice/

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How to Use CommandLineRunner in Spring Boot Application

Posted on November 25, 2017 by Mahmood

package com.therealdanvega;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
 
@Component
public class DataLoader implements CommandLineRunner {
 
    private final Logger logger = LoggerFactory.getLogger(DataLoader.class);
 
    @Override
    public void run(String... strings) throws Exception {
        logger.info("Loading data...");
 
    }
}

package com.therealdanvega;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.boot.CommandLineRunner;

import org.springframework.stereotype.Component;

@Component

public class DataLoader implements CommandLineRunner {

private final Logger logger = LoggerFactory.getLogger(DataLoader.class);

@Override

public void run(String... strings) throws Exception {

logger.info("Loading data...");

}

References https://www.quickprogrammingtips.com/spring-boot/how-to-use-commandlinerunner-in-spring-boot-application.html http://therealdanvega.com/blog/2017/04/07/spring-boot-command-line-runner

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Common application properties for Spring

Posted on October 14, 2017 by Mahmood

References https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html

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@PathVariable in Spring Boot

Posted on July 10, 2017 by Mahmood

    @RequestMapping("/news/{year}/{month}/{day}/{title}")
    public ModelAndView news(HttpServletRequest request, HttpServletResponse response,
                             @PathVariable int year, @PathVariable int month, @PathVariable int day,
                             @PathVariable String title) {

        SessionBL sessionManager = new SessionBL(request, response);

        String postUrl = String.format("/%d/%d/%d/%s", year, month, day, title);

        ModelAndView modelAndView = new ModelAndView("index");
        modelAndView.addObject("version", new Statics().getVersion());
        return modelAndView;
    }

@RequestMapping("/news/{year}/{month}/{day}/{title}")

public ModelAndView news(HttpServletRequest request, HttpServletResponse response,

@PathVariable int year, @PathVariable int month, @PathVariable int day,

@PathVariable String title) {

SessionBL sessionManager = new SessionBL(request, response);

String postUrl = String.format("/%d/%d/%d/%s", year, month, day, title);

ModelAndView modelAndView = new ModelAndView("index");

modelAndView.addObject("version", new Statics().getVersion());

return modelAndView;

}

References http://docs.spring.io/spring/docs/3.2.x/spring-framework-reference/html/mvc.html#mvc-ann-requestmapping-uri-templates-regex https://www.mkyong.com/spring-mvc/spring-rest-requestmapping-extract-incorrectly-if-value-contains/

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Query for Sub Document field in Spring Data Mongodb

Posted on July 1, 2017 by Mahmood

To resolve this ambiguity you can use _ inside your method name to manually define traversal points. So our method name would end up like […]

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Configure Spring Session with Redis

Posted on June 27, 2017 by Mahmood

build.gradle

compile('org.springframework.session:spring-session')
compile('org.springframework.boot:spring-boot-starter-data-redis')

1 2	compile('org.springframework.session:spring-session') compile('org.springframework.boot:spring-boot-starter-data-redis')

application.properties

spring.session.store-type=redis

spring.redis.host=localhost
#spring.redis.password=secret
spring.redis.port=6379

spring.session.store-type=redis

spring.redis.host=localhost

#spring.redis.password=secret

spring.redis.port=6379

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Receive JSON data in Spring Boot MVC Controller

Posted on June 21, 2017 by Mahmood

FormsApiController.java

@RequestMapping(value = "/api/form/saveForm", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    public Map saveForm(HttpServletRequest request, HttpServletResponse response, @RequestBody String payload) {
        SessionManager sessionManager = new SessionManager(request, response);

        Map result = null;

        FormBL formBL = new FormBL(request, response);
        result = formBL.saveForm(payload);

        return result;
    }

@RequestMapping(value = "/api/form/saveForm", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)

public Map saveForm(HttpServletRequest request, HttpServletResponse response, @RequestBody String payload) {

SessionManager sessionManager = new SessionManager(request, response);

Map result = null;

FormBL formBL = new FormBL(request, response);

result = formBL.saveForm(payload);

return result;

}

FormBL.java

    public Map<String, Object> saveForm(String payload) {
        Map<String, Object> result = new HashMap<>();

        try {

            Gson gson = new Gson();
            PojoForm pojoForm = gson.fromJson(payload, PojoForm.class);

            Form form = new Form();
            if (pojoForm.formId > 0) {
                form.id = pojoForm.formId;
            }


            Machinery machinery = null;

            if (pojoForm.machineryId > 0) {
                machinery = Statics.machineryRepository.findById(pojoForm.machineryId);
            }

            form.name = pojoForm.formName;
            form.machinery = machinery;

            Form dbForm = Statics.formRepository.save(form);
            pojoForm.formId = dbForm.id;

            if (pojoForm.formRows.size() > 0) {
                for (PojoFormRow row : pojoForm.formRows) {
                    FormRow formRow = new FormRow();

                    if (row.getId() > 0) {
                        formRow.id = row.getId();
                    }

                    formRow.rowOrder = row.row_order;
                    formRow.rowType = row.getRowType();
                    formRow.title = row.getTitle();
                    formRow.form = dbForm;

                    FormRow dbFormRow = Statics.formRowRepository.save(formRow);
                    row.id = dbFormRow.id;

                    if (row.getRow_values().size() > 0) {
                        for (PojoRowValue rowValue : row.getRow_values()) {
                            RowSelectValue rowSelectValue = new RowSelectValue();

                            if (rowValue.getId() > 0) {
                                rowSelectValue.id = rowValue.getId();
                            }

                            rowSelectValue.title = rowValue.title;
                            rowSelectValue.titleOrder = rowValue.title_order;
                            rowSelectValue.formRow = dbFormRow;

                            RowSelectValue dbRowSelectValue = Statics.rowSelectValueRepository.save(rowSelectValue);
                            rowValue.id = dbRowSelectValue.id;
                        }
                    }
                }
            }

            result.put("form", "");
            result.put("error", 0);
        } catch (Exception ex) {
            // exception
            result.put("error", 1);
            ex.printStackTrace();
        }

        return result;
    }

public Map<String, Object> saveForm(String payload) {

Map<String, Object> result = new HashMap<>();

try {

Gson gson = new Gson();

PojoForm pojoForm = gson.fromJson(payload, PojoForm.class);

Form form = new Form();

if (pojoForm.formId > 0) {

form.id = pojoForm.formId;

}

Machinery machinery = null;

if (pojoForm.machineryId > 0) {

machinery = Statics.machineryRepository.findById(pojoForm.machineryId);

}

form.name = pojoForm.formName;

form.machinery = machinery;

Form dbForm = Statics.formRepository.save(form);

pojoForm.formId = dbForm.id;

if (pojoForm.formRows.size() > 0) {

for (PojoFormRow row : pojoForm.formRows) {

FormRow formRow = new FormRow();

if (row.getId() > 0) {

formRow.id = row.getId();

}

formRow.rowOrder = row.row_order;

formRow.rowType = row.getRowType();

formRow.title = row.getTitle();

formRow.form = dbForm;

FormRow dbFormRow = Statics.formRowRepository.save(formRow);

row.id = dbFormRow.id;

if (row.getRow_values().size() > 0) {

for (PojoRowValue rowValue : row.getRow_values()) {

RowSelectValue rowSelectValue = new RowSelectValue();

if (rowValue.getId() > 0) {

rowSelectValue.id = rowValue.getId();

}

rowSelectValue.title = rowValue.title;

rowSelectValue.titleOrder = rowValue.title_order;

rowSelectValue.formRow = dbFormRow;

RowSelectValue dbRowSelectValue = Statics.rowSelectValueRepository.save(rowSelectValue);

rowValue.id = dbRowSelectValue.id;

}

result.put("form", "");

result.put("error", 0);

} catch (Exception ex) {

// exception

result.put("error", 1);

ex.printStackTrace();

}

return result;

}

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No EntityManager with actual transaction available for current thread Exception on Spring

Posted on June 7, 2017 by Mahmood

@Transactional(readOnly = false)
public interface FormRowRepository extends JpaRepository<FormRow, Long> {
    List<FormRow> findByForm(Form form);
    void deleteById(Long id);
    void deleteById(List<Long> ids);
}

@Transactional(readOnly = false)

public interface FormRowRepository extends JpaRepository<FormRow, Long> {

List<FormRow> findByForm(Form form);

void deleteById(Long id);

void deleteById(List<Long> ids);

}

References https://stackoverflow.com/questions/10394857/how-to-use-transactional-with-spring-data

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