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Ignore case while find query using Mongodb.

March 14, 2018 Faiz Akram

public List<Student> readByRhid(String emailId) {
        Query query = new Query();
        Criteria criteria = Criteria.where(LabelConstant.STUDENT_DETAIL + "." + LabelConstant.EMAILID).regex("^"+emailId+"$", "i");
        query.addCriteria(criteria);
        return mongoTemplate.find(query, Student.class);
}

public List<Student> readByRhid(String emailId) {

Query query = new Query();

Criteria criteria = Criteria.where(LabelConstant.STUDENT_DETAIL + "." + LabelConstant.EMAILID).regex("^"+emailId+"$", "i");

query.addCriteria(criteria);

return mongoTemplate.find(query, Student.class);

}

Use This Criteria

Criteria criteria = Criteria.where(LabelConstant.STUDENT_DETAIL + "." + LabelConstant.EMAILID).regex("^"+emailId+"$", "i");

1	Criteria criteria = Criteria.where(LabelConstant.STUDENT_DETAIL + "." + LabelConstant.EMAILID).regex("^"+emailId+"$", "i");

How to add CORS with Spring?

March 7, 2018March 7, 2018 Faiz Akram

1st Example For All Location

@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("/**");

}

2nd Example For Validate which location and which method to allow

@Configuration
@EnableWebMvc
public class AppConfig extends WebMvcConfigurerAdapter {
	@Override
	public void addCorsMappings(CorsRegistry registry) {
	  registry.addMapping("/**")
	   	  .allowedOrigins("http://localhost:8585", "http://localhost:8787")
		  .allowedMethods("POST", "GET",  "PUT", "OPTIONS", "DELETE")
		  .allowedHeaders("X-Auth-Token", "Content-Type")
		  .exposedHeaders("custom-header1", "custom-header2")
		  .allowCredentials(false)
		  .maxAge(4800);
	}
}

@Configuration

@EnableWebMvc

public class AppConfig extends WebMvcConfigurerAdapter {

@Override

public void addCorsMappings(CorsRegistry registry) {

registry.addMapping("/**")

.allowedOrigins("http://localhost:8585", "http://localhost:8787")

.allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")

.allowedHeaders("X-Auth-Token", "Content-Type")

.exposedHeaders("custom-header1", "custom-header2")

.allowCredentials(false)

.maxAge(4800);

}

How To Register Multiple Interceptor In Spring MVC?

March 7, 2018 Faiz Akram

Create Configuration Class extends with WebMvcConfigurerAdapter

 @Override
   public void addInterceptors(InterceptorRegistry registry) {
      // Register guest interceptor with single path pattern
      registry.addInterceptor(new GuestInterceptor()).addPathPatterns("/guest");

      // Register admin interceptor with multiple path patterns
      registry.addInterceptor(new AdminInterceptor())
              .addPathPatterns(new String[] { "/admin", "/admin/*" });
   }

@Override

public void addInterceptors(InterceptorRegistry registry) {

// Register guest interceptor with single path pattern

registry.addInterceptor(new GuestInterceptor()).addPathPatterns("/guest");

// Register admin interceptor with multiple path patterns

registry.addInterceptor(new AdminInterceptor())

.addPathPatterns(new String[] { "/admin", "/admin/*" });

}

Log4j Multiple Appender Simple Example in java

February 23, 2018 Faiz Akram

# Root logger option log4j.rootLogger=INFO, DEBUG, file,console # Console Appender log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.Append=true log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-ddHH:mm:ss,SSS} %-5p [ %M ] ( %C ) %c{1}:%L – %m%n # File Appender log4j.appender.file=org.apache.log4j.FileAppender log4j.appender.file.DatePattern=’.’yyyy-MM-dd-HH-mm log4j.appender.file.Append=true log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-ddHH:mm:ss,SSS} %-5p [ %M ] ( %C ) %c{1}:%L – %m%n log4j.appender.file.File=C:/log/SpringMain.log log4j.appender.file.MaxBackupIndex=10

Provide time zone to Spring @Scheduled or XML?

December 19, 2017December 19, 2017 Faiz Akram

//Annotation Based
@Scheduled(cron = "0 10 19 * * FRI", zone = "CET")

//XML Based
<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
	<property name="jobDetail" ref="schedulerJob" />
	<property name="cronExpression" value="0 10 9 ? * * " />
	<property name="timeZone" value="UTC"/>
  </bean>

//Annotation Based

@Scheduled(cron = "0 10 19 * * FRI", zone = "CET")

//XML Based

</bean>

Preferred Java way to ping an HTTP URL for availability

December 6, 2017 Faiz Akram

/**
	 * 
	 * @param url
	 * @return
	 */
	public Boolean validateURL(String url) {
		try {
		    final URLConnection connection = new URL(url).openConnection();
		    connection.connect();
		    return true;
		} catch (final MalformedURLException e) {
		    throw new IllegalStateException("Bad URL: " + url, e);
		} catch (final IOException e) {
		    return false;
		}
		
	}

/**

* @param url

* @return

public Boolean validateURL(String url) {

try {

final URLConnection connection = new URL(url).openConnection();

connection.connect();

return true;

} catch (final MalformedURLException e) {

throw new IllegalStateException("Bad URL: " + url, e);

} catch (final IOException e) {

return false;

}

Convert Date/Time for given Timezone – java

November 16, 2017November 16, 2017 Faiz Akram

        public static Date convertDateToAnotherTimeZone(Date inputDate, String inputTimezoneCode,
			String targetTimezoneCode) {

		TimeZone fromTimezone = TimeZone.getTimeZone(inputTimezoneCode);// get Timezone object
		TimeZone toTimezone = TimeZone.getTimeZone(targetTimezoneCode);

		long fromOffset = fromTimezone.getOffset(inputDate.getTime());// get offset
		long toOffset = toTimezone.getOffset(inputDate.getTime());

		// calculate offset difference and calculate the actual time
		long convertedTime = inputDate.getTime() - (fromOffset - toOffset);
		Date newDate = new Date(convertedTime);
		DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		df.format(newDate);

		return newDate;
	}

public static Date convertDateToAnotherTimeZone(Date inputDate, String inputTimezoneCode,

String targetTimezoneCode) {

TimeZone fromTimezone = TimeZone.getTimeZone(inputTimezoneCode);// get Timezone object

TimeZone toTimezone = TimeZone.getTimeZone(targetTimezoneCode);

long fromOffset = fromTimezone.getOffset(inputDate.getTime());// get offset

long toOffset = toTimezone.getOffset(inputDate.getTime());

// calculate offset difference and calculate the actual time

long convertedTime = inputDate.getTime() - (fromOffset - toOffset);

Date newDate = new Date(convertedTime);

DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

df.format(newDate);

return newDate;

}

Ignore DST when using Java Calendars

November 15, 2017 Faiz Akram

private static Date offsetTimeZone(Date date, String fromTZ, String toTZ){
		 
		// Construct FROM and TO TimeZone instances
		TimeZone fromTimeZone = TimeZone.getTimeZone(fromTZ);
		TimeZone toTimeZone = TimeZone.getTimeZone(toTZ);
		 
		// Get a Calendar instance using the default time zone and locale.
		Calendar calendar = Calendar.getInstance();
		 
		// Set the calendar's time with the given date
		calendar.setTimeZone(fromTimeZone);
		calendar.setTime(date);
		 
		System.out.println("Input: " + calendar.getTime() + " in " + fromTimeZone.getDisplayName());
		 
		 calendar.set(calendar.DST_OFFSET, 0); // this line to off DST
		// FROM TimeZone to UTC
		calendar.add(Calendar.MILLISECOND, fromTimeZone.getRawOffset() * -1);
		 
		if (fromTimeZone.inDaylightTime(calendar.getTime())) {
		calendar.add(Calendar.MILLISECOND, calendar.getTimeZone().getDSTSavings() * -1);
		System.out.println("hrere");
		}
		 
		// UTC to TO TimeZone
		calendar.add(Calendar.MILLISECOND, toTimeZone.getRawOffset());
		 
		if (toTimeZone.inDaylightTime(calendar.getTime())) {
		calendar.add(Calendar.MILLISECOND, toTimeZone.getDSTSavings());
		System.out.println("doing");
		}
		 
		return calendar.getTime();
		 
		}

private static Date offsetTimeZone(Date date, String fromTZ, String toTZ){

// Construct FROM and TO TimeZone instances

TimeZone fromTimeZone = TimeZone.getTimeZone(fromTZ);

TimeZone toTimeZone = TimeZone.getTimeZone(toTZ);

// Get a Calendar instance using the default time zone and locale.

Calendar calendar = Calendar.getInstance();

// Set the calendar's time with the given date

calendar.setTimeZone(fromTimeZone);

calendar.setTime(date);

System.out.println("Input: " + calendar.getTime() + " in " + fromTimeZone.getDisplayName());

calendar.set(calendar.DST_OFFSET, 0); // this line to off DST

// FROM TimeZone to UTC

calendar.add(Calendar.MILLISECOND, fromTimeZone.getRawOffset() * -1);

if (fromTimeZone.inDaylightTime(calendar.getTime())) {

calendar.add(Calendar.MILLISECOND, calendar.getTimeZone().getDSTSavings() * -1);

System.out.println("hrere");

}

// UTC to TO TimeZone

calendar.add(Calendar.MILLISECOND, toTimeZone.getRawOffset());

if (toTimeZone.inDaylightTime(calendar.getTime())) {

calendar.add(Calendar.MILLISECOND, toTimeZone.getDSTSavings());

System.out.println("doing");

}

return calendar.getTime();

}

How to handle back button using spring security?

November 13, 2017 Faiz Akram

@Configuration
@EnableWebSecurity
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

        @Override
	protected void configure(HttpSecurity http) throws Exception {
          http.headers().defaultsDisabled().cacheControl();
          .
          .
          .
         
          }
}

@Configuration

@EnableWebSecurity

public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

@Override

protected void configure(HttpSecurity http) throws Exception {

http.headers().defaultsDisabled().cacheControl();

}

Cannot change version of project facet Dynamic Web Module to 3.0?

November 12, 2017November 12, 2017 Faiz Akram

Their is one more way to resolve this problem (check it out hope it will help you to solve your problem)

PROBLEM

Cannot change version of project facet dynamic web module 2.3 to 3.0

SOLUTION

1. Go to your project location (ex.-D:/maven/todo)
2. go to .setting folder
3. check for this file: org.eclipse.wst.common.project.facet.core.xml
4. open the file and change "jst.web" property from 2.3 to 3.0, and save
5. Right click on project refresh the project and update maven
Done!!!....

Their is one more way to resolve this problem (check it out hope it will help you to solve your problem)

PROBLEM

Cannot change version of project facet dynamic web module 2.3 to 3.0

SOLUTION

1. Go to your project location (ex.-D:/maven/todo)

2. go to .setting folder

3. check for this file: org.eclipse.wst.common.project.facet.core.xml

4. open the file and change "jst.web" property from 2.3 to 3.0, and save

5. Right click on project refresh the project and update maven

Done!!!....