title
Mediator Design Pattern

description
Cut and Paste Code: http://goo.gl/A9Vws Welcome to my Mediator Design Pattern Tutorial! The Mediator design pattern is used to handle communication between related objects (Colleagues). All communication is handled by a Mediator Object and the Colleagues don't need to know anything about each other to work together. The Gang of Four description: Allows loose coupling by encapsulating the way disparate sets of objects interact and communicate with each other.  Allows for the actions of each object set to vary independently of one another.

detail
{'title': 'Mediator Design Pattern', 'heatmap': [{'end': 92.223, 'start': 31.678, 'weight': 0.895}, {'end': 224.166, 'start': 200.137, 'weight': 0.98}, {'end': 322.873, 'start': 296.855, 'weight': 0.983}, {'end': 360.034, 'start': 343.387, 'weight': 0.814}, {'end': 411.414, 'start': 397.027, 'weight': 0.743}], 'summary': 'Explains the mediator design pattern for managing communication between objects, demonstrated through the creation of stock trading objects and successful transactions involving 100 shares of microsoft and nrg stock.', 'chapters': [{'end': 308.382, 'segs': [{'end': 92.223, 'src': 'heatmap', 'start': 14.602, 'weight': 0, 'content': [{'end': 31.377, 'text': "All communication is handled by the mediator and the colleagues do not need to know anything about each And the Gang of Four's definition is that this mediator design pattern allows loose coupling by encapsulating the way desperate sets of objects interact and communicate with each other.", 'start': 14.602, 'duration': 16.775}, {'end': 36.802, 'text': 'And the mediator design pattern allows for the actions of each object to vary independently of one another.', 'start': 31.678, 'duration': 5.124}, {'end': 40.125, 'text': "So let's look at some pictures and make sense of all this, because it's very simple.", 'start': 36.902, 'duration': 3.223}, {'end': 46.57, 'text': "Basically, what you have here is your mediator, which is an interface, and then you're going to have a concrete mediator from that point.", 'start': 40.245, 'duration': 6.325}, {'end': 51.694, 'text': "And then you're going to notice by looking at this is the mediator interface and the abstract class,", 'start': 46.59, 'duration': 5.104}, {'end': 56.618, 'text': 'which is going to represent all colleagues that are created, all share common methods.', 'start': 51.694, 'duration': 4.924}, {'end': 62.562, 'text': "And how they're going to communicate to the mediator is through the use of these common methods.", 'start': 56.998, 'duration': 5.564}, {'end': 70.368, 'text': 'And then the client is going to deal with both a concrete mediator or mediators, as well as concrete colleagues,', 'start': 62.862, 'duration': 7.506}, {'end': 76.93, 'text': 'and the colleagues are going to send messages to the mediator and the mediator is going to turn around and send those messages, if needed,', 'start': 70.368, 'duration': 6.562}, {'end': 83.613, 'text': "to other colleagues that need to either buy or sell stocks, which is the example I'm going to use in this presentation.", 'start': 76.93, 'duration': 6.683}, {'end': 85.214, 'text': "So let's jump right into the code.", 'start': 83.633, 'duration': 1.581}, {'end': 92.223, 'text': "Okay, so here we are, and since we're going to be dealing with stocks, I'm going to create an object that I call stockoffer.java.", 'start': 85.959, 'duration': 6.264}], 'summary': 'Mediator design pattern enables loose coupling and independent actions among objects.', 'duration': 22.2, 'max_score': 14.602, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A14602.jpg'}, {'end': 76.93, 'src': 'embed', 'start': 51.694, 'weight': 1, 'content': [{'end': 56.618, 'text': 'which is going to represent all colleagues that are created, all share common methods.', 'start': 51.694, 'duration': 4.924}, {'end': 62.562, 'text': "And how they're going to communicate to the mediator is through the use of these common methods.", 'start': 56.998, 'duration': 5.564}, {'end': 70.368, 'text': 'And then the client is going to deal with both a concrete mediator or mediators, as well as concrete colleagues,', 'start': 62.862, 'duration': 7.506}, {'end': 76.93, 'text': 'and the colleagues are going to send messages to the mediator and the mediator is going to turn around and send those messages, if needed,', 'start': 70.368, 'duration': 6.562}], 'summary': 'Colleagues will share common methods to communicate with the mediator, who will handle messages between colleagues and clients.', 'duration': 25.236, 'max_score': 51.694, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A51694.jpg'}, {'end': 111.817, 'src': 'embed', 'start': 85.959, 'weight': 3, 'content': [{'end': 92.223, 'text': "Okay, so here we are, and since we're going to be dealing with stocks, I'm going to create an object that I call stockoffer.java.", 'start': 85.959, 'duration': 6.264}, {'end': 95.726, 'text': 'And this whole presentation, for the most part, is going to be done out of my head.', 'start': 92.404, 'duration': 3.322}, {'end': 98.988, 'text': 'so this is going to be all improv, because you guys seem to like whenever I do that.', 'start': 95.726, 'duration': 3.262}, {'end': 104.372, 'text': "So, just to keep this really simple, I'm going to say okay well, what do I need to do to trade stock shares?", 'start': 99.168, 'duration': 5.204}, {'end': 107.574, 'text': "I'm not going to worry about prices and all that, because that's not really important.", 'start': 104.432, 'duration': 3.142}, {'end': 111.817, 'text': "But I am going to need to know the number of shares, or at least I'm going to in this situation.", 'start': 107.634, 'duration': 4.183}], 'summary': 'Creating stockoffer.java for trading stock shares, focusing on number of shares, presented in an improvised manner.', 'duration': 25.858, 'max_score': 85.959, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A85959.jpg'}, {'end': 231.408, 'src': 'heatmap', 'start': 200.137, 'weight': 0.98, 'content': [{'end': 204.339, 'text': 'So that is going to allow me to create stock offerings.', 'start': 200.137, 'duration': 4.202}, {'end': 215.803, 'text': "So the next thing I'm going to need to do is come in here and create an abstract class that's going to represent all of my colleagues or people that will be putting through those stock offers that I just typed in there.", 'start': 204.619, 'duration': 11.184}, {'end': 224.166, 'text': "So I'm going to need always access to a mediator because we're going to be calling mediator methods as you saw in the UML diagram we did before.", 'start': 216.003, 'duration': 8.163}, {'end': 231.408, 'text': "And let's also say that we want to have a colleague code defined for all of my colleagues that are created.", 'start': 224.706, 'duration': 6.702}], 'summary': 'Creating stock offerings and abstract class for colleagues to put through stock offers, needing access to a mediator for mediator methods.', 'duration': 31.271, 'max_score': 200.137, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A200137.jpg'}, {'end': 268.608, 'src': 'embed', 'start': 224.706, 'weight': 4, 'content': [{'end': 231.408, 'text': "And let's also say that we want to have a colleague code defined for all of my colleagues that are created.", 'start': 224.706, 'duration': 6.702}, {'end': 233.109, 'text': 'And this is very important.', 'start': 231.788, 'duration': 1.321}, {'end': 237.29, 'text': "You're always going to have a creation of a new mediator.", 'start': 233.309, 'duration': 3.981}, {'end': 240.771, 'text': 'So all of the colleagues are using the same mediator.', 'start': 237.49, 'duration': 3.281}, {'end': 244.672, 'text': "And mediator is going to be equal to new mediator that's passed over.", 'start': 241.071, 'duration': 3.601}, {'end': 246.453, 'text': "So that's something we're always going to have.", 'start': 244.852, 'duration': 1.601}, {'end': 248.64, 'text': "And then we're going to go public void.", 'start': 246.758, 'duration': 1.882}, {'end': 255.927, 'text': "Remember we said sale offer is going to be offered every single time and it's going to be string stock int shares.", 'start': 248.66, 'duration': 7.267}, {'end': 261.471, 'text': "And then to initiate this sale offer we're going to go hey mediator sale offer.", 'start': 256.286, 'duration': 5.185}, {'end': 265.516, 'text': "I want you to handle this and we're going to say stock shares.", 'start': 261.752, 'duration': 3.764}, {'end': 268.608, 'text': 'This is a reference to this object.', 'start': 266.047, 'duration': 2.561}], 'summary': 'Define colleague code for all new colleagues using a shared mediator for sale offers.', 'duration': 43.902, 'max_score': 224.706, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A224706.jpg'}], 'start': 0.069, 'title': 'Mediator design pattern and stock trading objects', 'summary': 'Introduces the mediator design pattern for handling communication between objects, with an example of buying and selling stocks, and discusses the creation of stock trading objects including stockoffer.java and an abstract class for colleagues with defined mediator and colleague code.', 'chapters': [{'end': 85.214, 'start': 0.069, 'title': 'Mediator design pattern', 'summary': 'Introduces the mediator design pattern, which is used to handle communication between related objects, allowing for loose coupling and independent variation of object actions, with the example of buying and selling stocks.', 'duration': 85.145, 'highlights': ['The mediator design pattern allows loose coupling by encapsulating the way desperate sets of objects interact and communicate with each other. This pattern enables loose coupling, enhancing maintainability and flexibility in the system.', 'The mediator design pattern allows for the actions of each object to vary independently of one another. This pattern facilitates independent variation of object actions, promoting modularity and extensibility.', 'Colleagues communicate with the mediator through common methods, and the mediator handles communication between the colleagues. Communication between colleagues is facilitated through common methods, enhancing the reusability and consistency of communication processes.']}, {'end': 308.382, 'start': 85.959, 'title': 'Creating stock trading objects', 'summary': 'Discusses the creation of a stockoffer.java object for trading stock shares, including the constructor for number of shares and stock symbol, and the creation of an abstract class for colleagues with defined mediator and colleague code, as well as the sale offer and buy offer methods.', 'duration': 222.423, 'highlights': ['The chapter discusses the creation of a stockoffer.java object for trading stock shares, including the constructor for number of shares and stock symbol.', 'The creation of an abstract class for colleagues with defined mediator and colleague code is explained.', 'The sale offer and buy offer methods are discussed, including how they interact with the mediator object.']}], 'duration': 308.313, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A69.jpg', 'highlights': ['The mediator design pattern allows loose coupling by encapsulating the way desperate sets of objects interact and communicate with each other. This pattern enables loose coupling, enhancing maintainability and flexibility in the system.', 'Colleagues communicate with the mediator through common methods, and the mediator handles communication between the colleagues. Communication between colleagues is facilitated through common methods, enhancing the reusability and consistency of communication processes.', 'The mediator design pattern allows for the actions of each object to vary independently of one another. This pattern facilitates independent variation of object actions, promoting modularity and extensibility.', 'The chapter discusses the creation of a stockoffer.java object for trading stock shares, including the constructor for number of shares and stock symbol.', 'The creation of an abstract class for colleagues with defined mediator and colleague code is explained.', 'The sale offer and buy offer methods are discussed, including how they interact with the mediator object.']}, {'end': 561.706, 'segs': [{'end': 336.604, 'src': 'embed', 'start': 308.462, 'weight': 0, 'content': [{'end': 312.405, 'text': "Okay, so now that we have that all set up, this abstract class, let's copy that.", 'start': 308.462, 'duration': 3.943}, {'end': 318.79, 'text': "Then I have a new object I'm going to create called Gorman slacks, and it's going to be one of these colleagues.", 'start': 312.425, 'duration': 6.365}, {'end': 322.873, 'text': "So we're going to come in here and we're going to get all of the different methods that we're going to need.", 'start': 319.13, 'duration': 3.743}, {'end': 327.997, 'text': "Add constructor is going to be the only one, even though it's going to have access to all those other ones, of course.", 'start': 323.214, 'duration': 4.783}, {'end': 334.302, 'text': "And then in this one, just to know that our colleague has been created, I'm going to go system out print line.", 'start': 328.197, 'duration': 6.105}, {'end': 336.604, 'text': "And in this situation, I'm going to go Gorman slacks.", 'start': 334.542, 'duration': 2.062}], 'summary': 'Creating a new object called gorman slacks with one colleague, adding a constructor and methods.', 'duration': 28.142, 'max_score': 308.462, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A308462.jpg'}, {'end': 370.323, 'src': 'heatmap', 'start': 343.387, 'weight': 1, 'content': [{'end': 350.67, 'text': "so we have that all set up and then jt poor man's going to do exactly the same thing, except jt poor man's going to be like that.", 'start': 343.387, 'duration': 7.283}, {'end': 351.65, 'text': "so that's it.", 'start': 350.67, 'duration': 0.98}, {'end': 353.251, 'text': 'so now that we have those set up,', 'start': 351.65, 'duration': 1.601}, {'end': 360.034, 'text': "let's go into mediator.java and create the mediator that's going to handle all these colleagues that we're going to create.", 'start': 353.251, 'duration': 6.783}, {'end': 363.057, 'text': "So it's going to be an interface, and here, of course,", 'start': 360.214, 'duration': 2.843}, {'end': 370.323, 'text': "we're going to create all of the different methods that we're going to use for the colleagues as well as for all the mediators,", 'start': 363.057, 'duration': 7.266}], 'summary': 'Creating a mediator interface to handle colleagues and mediators in mediator.java.', 'duration': 26.936, 'max_score': 343.387, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A343387.jpg'}, {'end': 424.619, 'src': 'heatmap', 'start': 397.027, 'weight': 2, 'content': [{'end': 403.15, 'text': 'So now that we have the colleagues all set up, Now we need to come in here and create stock mediator.', 'start': 397.027, 'duration': 6.123}, {'end': 404.071, 'text': "So let's do that.", 'start': 403.29, 'duration': 0.781}, {'end': 404.851, 'text': 'And here it is.', 'start': 404.251, 'duration': 0.6}, {'end': 407.812, 'text': 'Public class stock mediator implements mediator.', 'start': 405.011, 'duration': 2.801}, {'end': 409.273, 'text': "And it's going to help me out here.", 'start': 408.112, 'duration': 1.161}, {'end': 411.414, 'text': "It's going to say there's some methods you need to implement.", 'start': 409.293, 'duration': 2.121}, {'end': 413.455, 'text': 'Great Add on implemented methods.', 'start': 411.554, 'duration': 1.901}, {'end': 414.315, 'text': 'And there they are.', 'start': 413.715, 'duration': 0.6}, {'end': 422.078, 'text': "Now as we think through here, exactly what we're going to have, let's say array list, which is going to have all of my different colleagues.", 'start': 414.555, 'duration': 7.523}, {'end': 424.619, 'text': "That's something that could be definitely useful.", 'start': 422.138, 'duration': 2.481}], 'summary': 'Creating stock mediator with implemented methods and array list for colleagues.', 'duration': 40.423, 'max_score': 397.027, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A397027.jpg'}], 'start': 308.462, 'title': 'Creating objects and mediators', 'summary': 'Covers the creation of a new object called gorman slacks and the process of creating a stock mediator and its colleagues. it includes defining constructors, methods for communication, and initialization of arrays and integer values.', 'chapters': [{'end': 343.387, 'start': 308.462, 'title': 'Creating gorman slacks object', 'summary': 'Covers the creation of a new object called gorman slacks, which includes defining a constructor and displaying a message indicating that the colleague has been created.', 'duration': 34.925, 'highlights': ['Defining a new object called Gorman slacks and setting up an abstract class.', 'Creating a constructor for the Gorman slacks object to provide access to various methods.', "Displaying a message confirming the creation of the Gorman slacks object with 'Gorman slacks signed up for the exchange.'"]}, {'end': 561.706, 'start': 343.387, 'title': 'Creating stock mediator and colleagues', 'summary': 'Introduces the process of creating a stock mediator and its colleagues, including the creation of methods for communication and the initialization of arrays and integer values. it also covers the addition of new colleagues and the assignment of colleague codes.', 'duration': 218.319, 'highlights': ['The chapter introduces the process of creating a stock mediator and its colleagues, including the creation of methods for communication and the initialization of arrays and integer values. It also covers the addition of new colleagues and the assignment of colleague codes.', 'The mediator.java file is used to create the mediator interface and define the methods for communication between colleagues and mediators, which include getting stock, getting shares, getting a colleague code, and adding a colleague.', 'The stock mediator class is created, implementing the mediator interface and initializing arrays for colleagues, stock buy offers, and stock sell offers, along with an integer for tracking colleague codes and a constructor to initialize the arrays.', 'The process of adding new colleagues to the stock mediator is detailed, involving adding the colleague to the array list, incrementing the colleague code, and setting the colleague code for the new colleague.']}], 'duration': 253.244, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A308462.jpg', 'highlights': ['Creating a constructor for the Gorman slacks object to provide access to various methods.', 'The mediator.java file is used to create the mediator interface and define the methods for communication between colleagues and mediators.', 'The process of adding new colleagues to the stock mediator is detailed, involving adding the colleague to the array list, incrementing the colleague code, and setting the colleague code for the new colleague.', 'Defining a new object called Gorman slacks and setting up an abstract class.', 'The stock mediator class is created, implementing the mediator interface and initializing arrays for colleagues, stock buy offers, and stock sell offers, along with an integer for tracking colleague codes and a constructor to initialize the arrays.']}, {'end': 1109.452, 'segs': [{'end': 614.106, 'src': 'embed', 'start': 585.531, 'weight': 3, 'content': [{'end': 589.432, 'text': "Then we're going to go stock buy offers like this.", 'start': 585.531, 'duration': 3.901}, {'end': 591.993, 'text': 'And we just need to say, OK, so sale offer.', 'start': 589.492, 'duration': 2.501}, {'end': 593.193, 'text': "Here's a sale offer.", 'start': 592.053, 'duration': 1.14}, {'end': 597.615, 'text': 'Then we need to increment through all of our current buy offers to see if.', 'start': 593.353, 'duration': 4.262}, {'end': 600.158, 'text': "anybody's interested in buying that stock.", 'start': 598.297, 'duration': 1.861}, {'end': 601.299, 'text': "So that's all we're doing.", 'start': 600.338, 'duration': 0.961}, {'end': 604.321, 'text': 'And currently at the very beginning, stock sold is equal to false.', 'start': 601.339, 'duration': 2.982}, {'end': 614.106, 'text': 'Well then, just thinking through this here, we need to go offer get stock symbol, which we created before, and see if it is equal to stock.', 'start': 604.561, 'duration': 9.545}], 'summary': 'Increment through buy offers to check interest in stock sale.', 'duration': 28.575, 'max_score': 585.531, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A585531.jpg'}, {'end': 736.268, 'src': 'embed', 'start': 708.997, 'weight': 4, 'content': [{'end': 712.659, 'text': "and let's throw a break statement in there and that'll just throw us out of that loop.", 'start': 708.997, 'duration': 3.662}, {'end': 720.982, 'text': "and then, after we get done with this, for each statement block that we have here, let's say we go if stock sold.", 'start': 712.659, 'duration': 8.323}, {'end': 723.884, 'text': 'And then we can do another message that gets printed out.', 'start': 721.203, 'duration': 2.681}, {'end': 731.566, 'text': "And in this situation, I'm going to go shares plus shares of and then stock is the stock symbol.", 'start': 724.104, 'duration': 7.462}, {'end': 736.268, 'text': 'And we could say something like added to inventory like that.', 'start': 731.866, 'duration': 4.402}], 'summary': 'Using a break statement to exit a loop and generating a message for each stock sold.', 'duration': 27.271, 'max_score': 708.997, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A708997.jpg'}, {'end': 819.11, 'src': 'embed', 'start': 794.281, 'weight': 2, 'content': [{'end': 801.121, 'text': "So in this situation, stock And this, we're trying to sell one, so we want to check if the stock was bought or not.", 'start': 794.281, 'duration': 6.84}, {'end': 806.184, 'text': 'And then we want to cycle through the sale offers, not the buy offers.', 'start': 801.381, 'duration': 4.803}, {'end': 808.285, 'text': 'This is going to be exactly the same.', 'start': 806.504, 'duration': 1.781}, {'end': 815.368, 'text': "We're just checking to see if the stock symbol that is for sale is the same as the stock symbol that they are offering to buy.", 'start': 808.325, 'duration': 7.043}, {'end': 816.929, 'text': 'This is all going to be the same.', 'start': 815.388, 'duration': 1.541}, {'end': 819.11, 'text': 'And this is going to be sell offers.', 'start': 817.129, 'duration': 1.981}], 'summary': 'Checking if stock was bought, cycling through sale offers to match stock symbols.', 'duration': 24.829, 'max_score': 794.281, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A794281.jpg'}, {'end': 1066.143, 'src': 'embed', 'start': 1039.903, 'weight': 0, 'content': [{'end': 1044.728, 'text': "And let's say he wants to make a buy offer for Microsoft.", 'start': 1039.903, 'duration': 4.825}, {'end': 1046.549, 'text': 'And he wants to buy 100 shares.', 'start': 1045.048, 'duration': 1.501}, {'end': 1055.496, 'text': "And then let's also say that broker two wants to make a sale offer of nrg stock and he wants to sell 10 shares of that.", 'start': 1046.89, 'duration': 8.606}, {'end': 1061.9, 'text': "and then let's say broker comes in here again and goes buy offer and he wants to buy nrg,", 'start': 1055.496, 'duration': 6.404}, {'end': 1066.143, 'text': "he wants to buy 10 shares and then at the end of that we're stock mediator.", 'start': 1061.9, 'duration': 4.243}], 'summary': 'Brokers want to trade 100 microsoft shares and 10 nrg shares.', 'duration': 26.24, 'max_score': 1039.903, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A1039903.jpg'}], 'start': 561.966, 'title': 'Stock trading process', 'summary': 'Discusses handling sale offers, tracking stock sold, incrementing through buy offers, checking for matching stock and shares, erasing buy offers upon sale, and updating stock sold status. it also covers the implementation of a stock mediator to facilitate stock trading, resulting in successful transactions of 100 shares of microsoft and nrg stock.', 'chapters': [{'end': 731.566, 'start': 561.966, 'title': 'Stock sale offer process', 'summary': 'Discusses the process of handling sale offers and tracking stock sold, including incrementing through buy offers, checking for matching stock and shares, erasing buy offers upon sale, and updating the stock sold status.', 'duration': 169.6, 'highlights': ['The process involves tracking if the stock has been sold, incrementing through stock buy offers, and checking for matching stock and shares to handle the sale offer.', 'Upon finding a matching buy offer, the system erases the buy offer from the list and updates the stock sold status to true, preventing further cycling through buy offers.', 'The chapter also includes printing out messages for matching stock and shares, as well as using break statements to exit the loop upon successful sale.']}, {'end': 1109.452, 'start': 731.866, 'title': 'Stock mediator implementation', 'summary': 'Discusses the implementation of a stock mediator to facilitate stock trading, including adding stocks to inventory, making buy and sell offers, and printing out stock offerings, resulting in successful transactions of 100 shares of microsoft and nrg stock.', 'duration': 377.586, 'highlights': ['The implementation includes adding stocks to inventory, making buy and sell offers, and printing out stock offerings, resulting in successful transactions of 100 shares of Microsoft and NRG stock.', 'The mediator design pattern facilitates communication between brokers, allowing them to make buy and sell offers for stocks such as Microsoft and NRG.', 'The code example demonstrates the process of adding stocks to inventory, making buy and sell offers, and successfully executing transactions for stocks like Microsoft and NRG.']}], 'duration': 547.486, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/8DxIpdKd41A/pics/8DxIpdKd41A561966.jpg', 'highlights': ['The mediator design pattern facilitates communication between brokers, allowing them to make buy and sell offers for stocks such as Microsoft and NRG.', 'The implementation includes adding stocks to inventory, making buy and sell offers, and printing out stock offerings, resulting in successful transactions of 100 shares of Microsoft and NRG stock.', 'The process involves tracking if the stock has been sold, incrementing through stock buy offers, and checking for matching stock and shares to handle the sale offer.', 'Upon finding a matching buy offer, the system erases the buy offer from the list and updates the stock sold status to true, preventing further cycling through buy offers.', 'The chapter also includes printing out messages for matching stock and shares, as well as using break statements to exit the loop upon successful sale.']}], 'highlights': ['The mediator design pattern allows loose coupling by encapsulating the way desperate sets of objects interact and communicate with each other. This pattern enables loose coupling, enhancing maintainability and flexibility in the system.', 'The mediator design pattern facilitates communication between brokers, allowing them to make buy and sell offers for stocks such as Microsoft and NRG.', 'The implementation includes adding stocks to inventory, making buy and sell offers, and printing out stock offerings, resulting in successful transactions of 100 shares of Microsoft and NRG stock.', 'Colleagues communicate with the mediator through common methods, and the mediator handles communication between the colleagues. Communication between colleagues is facilitated through common methods, enhancing the reusability and consistency of communication processes.', 'The mediator design pattern allows for the actions of each object to vary independently of one another. This pattern facilitates independent variation of object actions, promoting modularity and extensibility.', 'The process involves tracking if the stock has been sold, incrementing through stock buy offers, and checking for matching stock and shares to handle the sale offer.']}