Examples of de.fhg.igd.mongomvcc.VBranch.commit()

de.fhg.igd.mongomvcc.VBranch.commit()
Commit objects that have been added or changed in this branch to the database @return the new commit's ID (CID) @throws VException if the branch is named and the branch's headcould not be updated in the database, because it already has been updated somewhere else (most likely in another thread). If this happens, the commit has already been fully performed and {@link #getHead()} will return the new CID. The caller then has thechance to call {@link VDatabase#createBranch(String,long)} tocreate a new named branch based on this CID.

    
    // insert another person
    persons.insert(factory.createDocument("name", "Peter"));
    
    // 3. Commit index to the database
    long firstCid = master.commit();
    
    // 4. Read documents from the database
    VCursor c = persons.find();
    for (Map<String, Object> person : c) {
      System.out.print("Person { name: " + person.get("name"));

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    // 5. Make another commit
    persons.insert(factory.createDocument("name", "Max"));
    elvis.put("age", 4);
    persons.insert(elvis);
    master.commit();
    
    // 6. Checkout a previous version
    System.out.println("There are " + persons.find().size() + " persons");
    Map<String, Object> elvis3 = persons.findOne(factory.createDocument("name", "Elvis"));
    System.out.println("Elvis is now " + elvis3.get("age") + " years old");

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    VBranch maxBranch = _db.createBranch("Max", peterCid);
    VCollection maxPersons = maxBranch.getCollection("persons");
    assertEquals(1, maxPersons.find().size());
    
    maxPersons.insert(_factory.createDocument("name", "Max"));
    long maxCid = maxBranch.commit();
    
    maxBranch = _db.checkout("Max");
    assertEquals(maxCid, maxBranch.getHead());
    
    VBranch peterBranch = _db.checkout(VConstants.MASTER);

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    VCollection persons2 = master2.getCollection("persons");
    persons2.insert(_factory.createDocument("name", "Elvis"));


    long masterCid = _master.commit();
    try {
      master2.commit();
      fail("We expect a VException here since the branch's head " +
          "could not be updated");
    } catch (VException e) {
      //this is what we expect here
    }

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    persons2.insert(_factory.createDocument("name", "Pax"));
    long cid3 = master2.commit();
    
    VCollection persons3 = master3.getCollection("persons");
    persons3.insert(_factory.createDocument("name", "Peter"));
    long cid4 = master3.commit();
    
    VBranch master1a = _db.checkout(cid2);
    VCollection persons1a = master1a.getCollection("persons");
    persons1a.insert(_factory.createDocument("name", "Tom"));
    long cid5 = master1a.commit();

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    long cid4 = master3.commit();
    
    VBranch master1a = _db.checkout(cid2);
    VCollection persons1a = master1a.getCollection("persons");
    persons1a.insert(_factory.createDocument("name", "Tom"));
    long cid5 = master1a.commit();
    
    VBranch master2a = _db.checkout(cid3);
    VCollection persons2a = master2a.getCollection("persons");
    persons2a.insert(_factory.createDocument("name", "Bob"));
    long cid6 = master2a.commit();

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    long cid5 = master1a.commit();
    
    VBranch master2a = _db.checkout(cid3);
    VCollection persons2a = master2a.getCollection("persons");
    persons2a.insert(_factory.createDocument("name", "Bob"));
    long cid6 = master2a.commit();
    
    VBranch master3a = _db.checkout(cid4);
    VCollection persons3a = master3a.getCollection("persons");
    persons3a.insert(_factory.createDocument("name", "Howard"));
    long cid7 = master3a.commit();

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    long cid6 = master2a.commit();
    
    VBranch master3a = _db.checkout(cid4);
    VCollection persons3a = master3a.getCollection("persons");
    persons3a.insert(_factory.createDocument("name", "Howard"));
    long cid7 = master3a.commit();
    
    long stime = System.currentTimeMillis();
    Thread.sleep(500);
    
    persons3a.insert(_factory.createDocument("name", "Brenda"));

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    long stime = System.currentTimeMillis();
    Thread.sleep(500);
    
    persons3a.insert(_factory.createDocument("name", "Brenda"));
    long cid8 = master3a.commit();
    
    return new Object[] { new long[] { cid5, cid6, cid7, cid8 }, stime };
  }
  
  /**

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    r[0] = (Long)elvis.get(MongoDBConstants.ID);
    
    VBranch master2 = _db.createBranch("master2", cid1);
    VCollection persons2 = master2.getCollection("persons");
    persons2.insert(_factory.createDocument("name", "Howard"));
    master2.commit();
    Map<String, Object> fritz = _factory.createDocument("name", "Fritz");
    persons2.insert(fritz);
    r[1] = (Long)fritz.get(MongoDBConstants.ID);
    
    long stime = System.currentTimeMillis();

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