# ADR-0002 - Avoid using Java serialization

## Status

- ACCEPTED on 2023-12-01

## Context

In Gradle we often need to serialize in-memory objects for caching, or to transmit them across process barriers, etc.
Java serialization is one way to implement this, however, despite its simplicity of implementation, it has several drawbacks:

- **Performance:**
Java's built-in serialization mechanism is often slower compared to other serialization solutions.

    private static final String BEGIN_KEY = "begin";

    /** Logger instance specifically for outputting crawler statistics. */
    protected Logger statsLogger = null;

    /** Name of the logger used for statistics output. */
    protected String loggerName = "fess.log.crawler.stats";

    /** Maximum number of statistics objects to cache. */
    protected long maxCacheSize = 1000;

     * This is a convenience method that calls the overloaded version with default parameters
     * (withLabelType=true, withRoleType=true, available=true, idList=null).
     *
     * @return a list of all available WebConfig objects
     */
    public List<WebConfig> getAllWebConfigList() {
        return getAllWebConfigList(true, true, true, null);
    }

    /**
     * Retrieves web crawling configurations filtered by a list of IDs.

        this.metadataResolver = Objects.requireNonNull(metadataResolver, "metadataResolver cannot be null");
        this.syncContextFactory = Objects.requireNonNull(syncContextFactory, "syncContextFactory cannot be null");
        this.repositoryEventDispatcher =
                Objects.requireNonNull(repositoryEventDispatcher, "repositoryEventDispatcher cannot be null");

     */
    static boolean isInScope(Artifact artifact, Artifact nodeArtifact) {
        return Objects.equals(artifact.getGroupId(), nodeArtifact.getGroupId())
                && Objects.equals(artifact.getArtifactId(), nodeArtifact.getArtifactId())
                && Objects.equals(artifact.getVersion(), nodeArtifact.getVersion());
    }

                return false;
            }
            Key<?> key = (Key<?>) o;
            return Objects.equals(id, key.id) && Objects.equals(type, key.type);
        }

        @Override
        public int hashCode() {
            return Objects.hash(id, type);
        }
    }

const metacacheStreamVersion = 2

// metacacheWriter provides a serializer of metacache objects.
type metacacheWriter struct {
	streamErr   error
	mw          *msgp.Writer
	creator     func() error
	closer      func() error
	blockSize   int
	streamWg    sync.WaitGroup
	reuseBlocks bool
}

// newMetacacheWriter will create a serializer that will write objects in given order to the output.

)

// NewBgHealSequence creates a background healing sequence
// operation which scans all objects and heal them.
func newBgHealSequence() *healSequence {
	reqInfo := &logger.ReqInfo{API: "BackgroundHeal"}
	ctx, cancelCtx := context.WithCancel(logger.SetReqInfo(GlobalContext, reqInfo))

	hs := madmin.HealOpts{
		// Remove objects that do not have read-quorum
		Remove: healDeleteDangling,
	}

	return &healSequence{

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.util;

import jcifs.Encodable;

/**
 * Interface for objects that can be encoded to byte arrays.
 * Provides standardized method for converting objects to their binary representation.
 *
 * @author mbechler
 */
public class ByteEncodable implements Encodable {

    private final byte[] bytes;
    private final int off;

                        || o instanceof XmlNode that
                                && Objects.equals(this.name, that.name())
                                && Objects.equals(this.value, that.value())
                                && Objects.equals(this.attributes, that.attributes())
                                && Objects.equals(this.children, that.children());
            }

            @Override