How to match date filed in Google Datastore

By -
How to match date filed in Google Datastore

Suppose you have an 'Employee' entity with updatedOn field (Date or timestamp type). You can use Date function to parse date string and filter your data.

In GQL, you can use:
  SELECT * FROM EmployeeObj where updatedOn > Date('2014-09-25')

 Similarly in objectify, you can use filter
          Objectify obfy = OfyService.ofy();
          List<EmployeeObj> resultList = obfy.load().type(EmployeeObj.class)
.filter("updatedOn > ", Date('2014-09-25'))
                                                 .list();

Comments

Post a Comment

Popular posts from this blog

Struts 2 : Warning :No configuration found for the specified action: 'Login.action' in namespace: '/'

By -
No configuration found for the specified action: 'Login.action' in namespace: '/'''. Form action defaulting to 'action' attribute's literal value. Solution: To remove this warning you need to change following... See your struts.xml file what name you have specified... If you are using namespace / and your action name is 'Login' then  replace Login.action to Login as given below... <s:form action=" Login.action " method="post" >   Use below with namespace  1) <s:form action=" Login " method="post" namespace="/">   Or   2) <s:form action=" /Login " method="post" >   Now you will not get this warning.
Read more

Upload csv file at Google Cloud Storage using java

By -
First do all required pre requiste as per google doc https://cloud.google.com/appengine/docs/java/googlestorage/ Now see the sample code for a csv file uploader using latest api public String uploadFileUsingGCSClient(String csvDate, String fileName, String dirName,String bucketName) throws IOException {  // init the bucket access     GcsService gcsService = GcsServiceFactory.createGcsService(RetryParams.getDefaultInstance());     GcsFilename filename = new GcsFilename(bucketName+"/"+dirName, fileName);     GcsFileOptions fileOptions = new GcsFileOptions.Builder()    .mimeType("application/CSV")       .acl("public-read")    //.addUserMetadata("myfield1", "my field value")    .build();     GcsOutputChannel outputChannel = gcsService.createOrReplace(filename, fileOptions);          // write file using this st...
Read more

Read Images from a xlsx file using Apache POI

By -
This article is all about how to read and download images inside a file in xlsx format. We will use Apache POI using java. 1. Maven dependencies commons-logging-1.2.jar  commons-collections4-4.1.jar openxml4j-1.0-betapoi-3.16.jar poi-ooxml-3.16.jar poi-ooxml-schemas-3.16.jar xmlbeans-2.6.0.jar servlet-api 2. Sharing java code import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import org.apache.poi.ss.usermodel.PictureData; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFDrawing; import org.apache.poi.xssf.usermodel.XSSFPicture; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFShape; import org.apache.poi.xssf.usermodel.XSSFSheet; imp...
Read more