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src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java

Summary

Maintainability
C
1 day
Test Coverage

SpscUnboundedAtomicArrayQueue has 35 methods (exceeds 20 allowed). Consider refactoring.
Open

public final class SpscUnboundedAtomicArrayQueue<T> implements Queue<T> {
    static final int MAX_LOOK_AHEAD_STEP = Integer.getInteger("jctools.spsc.max.lookahead.step", 4096);
    final AtomicLong producerIndex;
    int producerLookAheadStep;
    long producerLookAhead;
Severity: Minor
Found in src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java - About 4 hrs to fix

    Method resize has 5 arguments (exceeds 4 allowed). Consider refactoring.
    Open

        private void resize(final AtomicReferenceArray<Object> oldBuffer, final long currIndex, final int offset, final T e,
            final long mask) {
    Severity: Minor
    Found in src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java - About 35 mins to fix

      Method offer has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
      Open

          @Override
    public boolean offer(final T e) {
        if (e == null) {
            throw new NullPointerException();
        }
      Severity: Minor
      Found in src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java - About 35 mins to fix

      Cognitive Complexity

      Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

      A method's cognitive complexity is based on a few simple rules:

      • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
      • Code is considered more complex for each "break in the linear flow of the code"
      • Code is considered more complex when "flow breaking structures are nested"

      Further reading

      Similar blocks of code found in 3 locations. Consider refactoring.
      Open

              if (index < producerLookAhead) {
            return writeToQueue(buffer, e, index, offset);
        } else {
            final int lookAheadStep = producerLookAheadStep;
            // go around the buffer or resize if full (unless we hit max capacity)
      Severity: Major
      Found in src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java and 2 other locations - About 2 hrs to fix
      src/main/java/rx/internal/util/atomic/SpscLinkedArrayQueue.java on lines 75..90
      src/main/java/rx/internal/util/unsafe/SpscUnboundedArrayQueue.java on lines 123..138

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 144.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 2 locations. Consider refactoring.
      Open

          @SuppressWarnings("unchecked")
    @Override
    public T peek() {
        final AtomicReferenceArray<Object> buffer = consumerBuffer;
        final long index = lpConsumerIndex();
      Severity: Major
      Found in src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java and 1 other location - About 1 hr to fix
      src/main/java/rx/internal/util/atomic/SpscLinkedArrayQueue.java on lines 164..177

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 79.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 7 locations. Consider refactoring.
      Open

          @Override
    public int size() {
        /*
         * It is possible for a thread to be interrupted or reschedule between the read of the producer and
         * consumer indices, therefore protection is required to ensure size is within valid range. In the
      Severity: Major
      Found in src/main/java/rx/internal/util/atomic/SpscUnboundedAtomicArrayQueue.java and 6 other locations - About 55 mins to fix
      src/main/java/rx/internal/util/atomic/SpscAtomicArrayQueue.java on lines 92..108
      src/main/java/rx/internal/util/atomic/SpscLinkedArrayQueue.java on lines 191..208
      src/main/java/rx/internal/util/unsafe/MpmcArrayQueue.java on lines 216..233
      src/main/java/rx/internal/util/unsafe/SpmcArrayQueue.java on lines 193..209
      src/main/java/rx/internal/util/unsafe/SpscArrayQueue.java on lines 153..169
      src/main/java/rx/internal/util/unsafe/SpscUnboundedArrayQueue.java on lines 235..252

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 63.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

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