How will the reading of topics and partitions be distributed among Processing Service instances (scaling)?
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Implement your own enum type as if before the modern enum in Java 1.5. It should implement the contract of a modern Java enum: • easy to get any enum value • safe comparison of values by reference (==) • each value has a string name matching the value name • each value has an integer `ordinal` identifier containing its declaration order • can get a list of all enum values • can get a value by its `ordinal` • can get a value by its name For example, you can take a list of currencies. It is important that the list is potentially extendable, because the quality of the code will determine how smoothly it will be in the future to add values to the enum. class Currency { // TODO } --- Given the user_orders table |ts|user_id|order_value| Return the sum of the first purchase for each user.
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