I am creating OSGi bundle for Mongodb using org.amdatu.mongo
service factory following this guide I am using Gridfs for the storage purpose. I am using eclipse Bndtool plugin.
for this purpose I have created an Interface Named AgendaMongo and an Activator and Implementation class here is code for both
public class Activator extends DependencyActivatorBase {
@Override
public void init(BundleContext arg0, DependencyManager manager)
throws Exception {
manager.add(createComponent()
.setInterface(AgendaMongo.class.getName(), null)
.setImplementation(Gridfs_Mongodb.class));
}
and the implementation
public class Gridfs_Mongodb implements AgendaMongo{
GridFSInputFile gfsinput=null;
private volatile MongoDBService mongoservice;
public Object store_in_db() {
GridFSInputFile gfsinput=null;
try {
GridFS gfsHandler;
gfsHandler = new GridFS(mongoservice.getDB(), "rest_data");// database
File uri = new File("f:\\get1.jpg"); // name and
gfsinput = gfsHandler.createFile(uri);
gfsinput.saveChunks(1000);
gfsinput.setFilename("new file");
gfsinput.save();
System.out.println(gfsinput.getId());
//save_filepath("file",gfsinput.getId());
Object get_id = gfsinput.getId();//get_filename();
System.out.println(getData(get_id));
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return gfsinput.getId();
}
/*
* Retrieving the file
*/
public InputStream getData(Object file_id) {
GridFS gfsPhoto = new GridFS(mongoservice.getDB(), "rest_data");
GridFSDBFile dataOutput = gfsPhoto.findOne((ObjectId) file_id);
DBCursor cursor = gfsPhoto.getFileList();
while (cursor.hasNext()) {
System.out.println(cursor.next());
}
System.out.println(dataOutput);
return dataOutput.getInputStream();
}
}
Now on Running and Testing it using apache Felix Gogo compiler I am getting the following exception.
! could not resolve the bundles
! Failed to start bundle agenda.mongodb.mongo_gfs-0.0.0, exception Unresolved constraint in bundle agenda.mongodb.mongo_gfs [7]: Unable to resolve 7.0: missing requirement [7.0] osgi.wiring.package; (&(osgi.wiring.package=com.mongodb)(version>=2.11.0)(!(version>=3.0.0)))
I have solved this problem According to amdatu we need mongo jar as a dependency that is required at run time for I need to add this mongo jar in requirement osgi.wiring.package
mostly occurs due to missing dependency package.