Package de.fhg.igd.mongomvcc

Examples of de.fhg.igd.mongomvcc.VCollection.findOne()

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         System.out.print(", age: " + person.get("age"));
      }
      System.out.println(" }");
    }
   
    Map<String, Object> elvis2 = persons.findOne(factory.createDocument("name", "Elvis"));
    if (elvis2 != null) {
      System.out.println("Elvis lives!");
    }
   
    // 5. Make another commit
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    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");
   
    VBranch oldMaster = db.checkout(firstCid);
    VCollection oldPersons = oldMaster.getCollection("persons");
    System.out.println("Previously, there were only " + oldPersons.find().size() + " persons");
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    System.out.println("Elvis is now " + elvis3.get("age") + " years old");
   
    VBranch oldMaster = db.checkout(firstCid);
    VCollection oldPersons = oldMaster.getCollection("persons");
    System.out.println("Previously, there were only " + oldPersons.find().size() + " persons");
    Map<String, Object> oldElvis = oldPersons.findOne(factory.createDocument("name", "Elvis"));
    System.out.println("Last year, Elvis was " + oldElvis.get("age") + " years old");
   
    // 7. Drop the database
    db.drop();
  }
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  public void goBackInTime() throws Exception {
    Map<String, Object> max = putPerson("Max", 6);
    long oldCid = _master.commit();
   
    VCollection persons = _master.getCollection("persons");
    Map<String, Object> max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(6, max2.get("age"));
   
    max.put("age", 7);
    persons.insert(max);
    _master.commit();
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    max.put("age", 7);
    persons.insert(max);
    _master.commit();
   
    persons = _master.getCollection("persons");
    max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(7, max2.get("age"));
   
    VBranch oldMaster = _db.checkout(oldCid);
    persons = oldMaster.getCollection("persons");
    max2 = persons.findOne(_factory.createDocument("name", "Max"));
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    max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(7, max2.get("age"));
   
    VBranch oldMaster = _db.checkout(oldCid);
    persons = oldMaster.getCollection("persons");
    max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(6, max2.get("age"));
  }
 
  /**
   * Tries to create a branch with a name already used
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    maxPersons = maxBranch.getCollection("persons");
    VCollection peterPersons = peterBranch.getCollection("persons");
    assertEquals(2, maxPersons.find().size());
    assertEquals(1, peterPersons.find().size());
    assertNotNull(maxPersons.findOne(_factory.createDocument("name", "Max")));
    assertNull(peterPersons.findOne(_factory.createDocument("name", "Max")));
   
    putPerson("Elvis", 3);
    long elvisCid = _master.commit();
   
    maxBranch = _db.checkout("Max");
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    maxPersons = maxBranch.getCollection("persons");
    peterPersons = peterBranch.getCollection("persons");
    assertEquals(2, maxPersons.find().size());
    assertEquals(2, peterPersons.find().size());
    assertNotNull(maxPersons.findOne(_factory.createDocument("name", "Max")));
    assertNull(peterPersons.findOne(_factory.createDocument("name", "Max")));
    assertNotNull(peterPersons.findOne(_factory.createDocument("name", "Elvis")));
    assertNull(maxPersons.findOne(_factory.createDocument("name", "Elvis")));
  }
 
  /**
 
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    peterPersons = peterBranch.getCollection("persons");
    assertEquals(2, maxPersons.find().size());
    assertEquals(2, peterPersons.find().size());
    assertNotNull(maxPersons.findOne(_factory.createDocument("name", "Max")));
    assertNull(peterPersons.findOne(_factory.createDocument("name", "Max")));
    assertNotNull(peterPersons.findOne(_factory.createDocument("name", "Elvis")));
    assertNull(maxPersons.findOne(_factory.createDocument("name", "Elvis")));
  }
 
  /**
   * Creates another branch after a conflict has happened
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    FloatBuffer bb = FloatBuffer.wrap(test);
    obj = new HashMap<String, Object>();
    obj.put("name", "Mona Lisa");
    obj.put("data", bb);
    coll.insert(obj);
    Map<String, Object> obj4 = coll.findOne(_factory.createDocument("uid", obj.get("uid")));
    assertEquals("Mona Lisa", obj4.get("name"));
    FloatBuffer bb4 = (FloatBuffer)obj4.get("data");
    bb4.rewind();
    float[] test4 = new float[bb4.remaining()];
    bb4.get(test4);
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