## Common Development Tasks

### Adding a Protocol Client

1. **Implement `CrawlerClient`**:
```java
public class MyClient extends AbstractCrawlerClient {
    @Override
    public ResponseData execute(RequestData request) { /* ... */ }

    @Override
    public void close() { /* cleanup */ }
}
```

2. **Register in DI config** (`crawler.xml`):
```xml

      TestSubjectGenerator<? extends Iterable<E>> collectionGenerator) {
    this.collectionGenerator = collectionGenerator;
  }

  @Override
  public TestSubjectGenerator<? extends Iterable<E>> getInnerGenerator() {
    return collectionGenerator;
  }

  @Override
  public Iterator<E> get() {
    return collectionGenerator.createTestSubject().iterator();
  }

        private String fieldName;

        private final StringBuilder buffer = new StringBuilder(1000);

        @Override
        public void startDocument() {
            dataMap.clear();
        }

        @Override
        public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) {
            if ("field".equals(qName)) {

    @Override
    public int getLoggingLevel() {
        return loggingLevel;
    }

    @Override
    public boolean isOffline() {
        return offline;
    }

    @Override
    public boolean isUpdateSnapshots() {
        return updateSnapshots;
    }

    @Override
    public boolean isNoSnapshotUpdates() {
        return noSnapshotUpdates;
    }

    @Override

    @Override
    public String getArtifactId() {
        return artifact.getArtifactId();
    }

    /** {@inheritDoc} */
    @Override
    public String getVersion() {
        return artifact.getVersion();
    }

    /** {@inheritDoc} */
    @Override
    public void setVersion(String version) {
        artifact.setVersion(version);
    }

    /** {@inheritDoc} */
    @Override

      checkValid(k);
    }
  }

  @Override
  public @Nullable Entry<K, V> ceilingEntry(K key) {
    return delegate.ceilingEntry(checkValid(key));
  }

  @Override
  public @Nullable K ceilingKey(K key) {
    return delegate.ceilingKey(checkValid(key));
  }

  @Override
  public void clear() {
    delegate.clear();
  }

  @Override
  public Comparator<? super K> comparator() {

    }

    @Override
    public @Nullable V ceiling(@ParametricNullness V v) {
      return getSortedSetDelegate().ceiling(v);
    }

    @Override
    public @Nullable V higher(@ParametricNullness V v) {
      return getSortedSetDelegate().higher(v);
    }

    @Override
    public @Nullable V pollFirst() {
      return Iterators.pollNext(iterator());
    }

    @Override

            return true;
        }

        @Override
        public CommonServerMessageBlockRequest createCancel() {
            return null;
        }

        @Override
        public int size() {
            return 0;
        }

        @Override
        public void setTid(int t) {
            this.tid = t;
        }

        @Override
        public Integer getOverrideTimeout() {

    }

    @Override
    boolean isLessThan(Comparable<?> value) {
      return true;
    }

    @Override
    BoundType typeAsLowerBound() {
      throw new IllegalStateException();
    }

    @Override
    BoundType typeAsUpperBound() {
      throw new AssertionError("this statement should be unreachable");
    }

    @Override
    Cut<Comparable<?>> withLowerBoundType(

     *            The third value
     */
    public void setValue3(final T3 value3) {
        this.value3 = value3;
    }

    @Override
    public String toString() {
        return "{" + value1 + ", " + value2 + ", " + value3 + "}";
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;