persistent-data

问题 I want to create a web application with a model that persists between HTTP requests. From what I understand languages like PHP treat each HTTP request as a brand new connection except for some global variables like SESSION; so each time the user changes pages all my PHP classes are loaded into memory again (and each AJAX request does this too) - requiring me to build from the database each time. Am I mistaken or am I trying to make a circle fit in a square? Memcached seems to be a good

问题 I have an activity and a model called CourseDetails . String getData; DatabaseReference mRef = FirebaseDatabase.getInstance().getReference().child("courses").child("Business"); mRef.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { CourseDetails c = dataSnapshot.getValue(CourseDetails.class); getData = c.getCourseName(); } @Override public void onCancelled(DatabaseError databaseError) { } }); textview1.setText(getData);