Angular Distributed Build System

Distributed builds are crucial for large Angular projects to significantly reduce build times by leveraging multiple machines. This challenge asks you to design and implement a simplified, simulated distributed build system for an Angular application. The goal is to split the Angular project's compilation tasks across multiple "workers" and aggregate the results to produce a final, complete build.

Problem Description

You are tasked with creating a system that simulates a distributed Angular build. The system will consist of a "master" and several "workers." The master will be responsible for dividing the Angular project's modules into chunks and assigning them to the workers. Each worker will compile its assigned modules and return the compiled output (simulated as a string). The master will then collect the outputs from all workers, concatenate them, and produce the final, complete build output.

What needs to be achieved:

• Module Splitting: The master should intelligently split the Angular modules (represented as an array of strings) into smaller chunks for distribution.
• Worker Assignment: The master should assign these chunks to available workers.
• Compilation Simulation: Each worker should simulate compiling its assigned modules and return a string representing the compiled output. This simulation can be a simple string concatenation of the module names.
• Output Aggregation: The master should collect the outputs from all workers and concatenate them to produce the final build output.

Key Requirements:

• The system should be able to handle a variable number of workers.
• The module splitting should aim for roughly equal distribution of modules across workers.
• The simulation should be deterministic (same input always produces the same output).
• The master should handle worker failures gracefully (simulate a worker returning an error).

Expected Behavior:

The master should receive a list of Angular modules and a number of workers. It should then distribute the modules, simulate compilation on each worker, and return a single string representing the complete build output. If a worker fails (simulated by returning an error string), the master should log the error and continue with the other workers.

Edge Cases to Consider:

• Empty Module List: What happens if the input module list is empty?
• Zero Workers: What happens if no workers are available?
• Uneven Module Distribution: How does the system handle situations where the modules cannot be evenly distributed?
• Worker Failure: How does the system handle a worker returning an error?

Examples

Example 1:

Input: modules = ["module1", "module2", "module3", "module4"], numWorkers = 2
Output: "module1module2module3module4"
Explanation: The master splits the modules into [["module1", "module2"], ["module3", "module4"]]. Worker 1 compiles "module1" and "module2" into "module1module2". Worker 2 compiles "module3" and "module4" into "module3module4". The master concatenates these to produce "module1module2module3module4".

Example 2:

Input: modules = ["moduleA", "moduleB", "moduleC"], numWorkers = 3
Output: "moduleAmoduleBmoduleC"
Explanation: The master splits the modules into [["moduleA"], ["moduleB"], ["moduleC"]]. Each worker compiles a single module. The master concatenates the outputs.

Example 3: (Worker Failure)

Input: modules = ["moduleX", "moduleY", "moduleZ"], numWorkers = 2
Output: "moduleXmoduleZ"
Explanation: The master splits the modules into [["moduleX", "moduleZ"], ["moduleY"]]. Worker 1 compiles "moduleX" and "moduleZ" into "moduleXmoduleZ". Worker 2 attempts to compile "moduleY" but fails and returns an error string. The master logs the error and continues with the output from Worker 1.

Constraints

• modules will be an array of strings, each representing an Angular module.
• numWorkers will be a positive integer.
• The simulated compilation output of each worker will be a string.
• Worker failure is simulated by returning the string "ERROR".
• The total number of modules will be less than 100.
• The length of each module name will be less than 50 characters.

Notes

• You can use any reasonable approach for splitting the modules. Aim for a balanced distribution.
• The "compilation" simulation is a placeholder. Focus on the distribution and aggregation logic.
• Consider using asynchronous operations to simulate the workers' parallel execution (though not strictly required for this simplified simulation).
• Error handling is important. The master should gracefully handle worker failures.
• The order of modules in the final output should reflect the order in which the workers complete their tasks. If a worker fails, its modules should be skipped in the final output.
• Assume that the workers are always available and responsive (except when they fail).