# Object Lock and Immutability Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)

MinIO server allows WORM for specific objects or by configuring a bucket with default object lock configuration that applies default retention mode and retention duration to all objects. This makes objects in the bucket immutable i.e. delete of the version are not allowed until an expiry specified in the bucket's object lock configuration or object retention.

| `minio_cluster_objects_size_distribution`    | Distribution of object sizes across a cluster                  |
| `minio_cluster_objects_version_distribution` | Distribution of object versions across a cluster               |
| `minio_cluster_usage_object_total`           | Total number of objects in a cluster                           |

	}
	// Notify object deleted event.
	sendEvent(eventArgs{
		EventName:  eventName,
		BucketName: dobj.Bucket,
		Object:     dobj,
		UserAgent:  "Internal: [ILM-Expiry]",
		Host:       globalLocalNodeName,
	})

	return true
}

// Apply object, object version, restored object or restored object version action on the given object

		Headers: http.Header{
			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
		},
		Bucket: "bucket",
		Object: "object2",
		Metadata: map[string]string{

        return (T) component;
    }

    /**
     * Wraps an object instance into a pooled object.
     *
     * @param obj The object to wrap
     * @return A PooledObject wrapping the given object
     */
    @Override
    public PooledObject<T> wrap(final T obj) {
        return new DefaultPooledObject<>(obj);
    }

    /**
     * Destroys a pooled object and notifies the destroy listener if set.

- [Use `mc sql` with MinIO Server](https://docs.min.io/community/minio-object-store/reference/minio-mc/mc-sql.html#command-mc.sql)
- [Use `minio-go` SDK with MinIO Server](https://docs.min.io/community/minio-object-store/developers/go/minio-go.html)
- [Use `aws-cli` with MinIO Server](https://docs.min.io/community/minio-object-store/integrations/aws-cli-with-minio.html)

        return Objects.equals(modelName, other.modelName) && Objects.equals(featureSetName, other.featureSetName)
                && Objects.equals(storeName, other.storeName) && Objects.equals(params, other.params)
                && Objects.equals(activeFeatures, other.activeFeatures);
    }

    @Override
    protected int doHashCode() {

/**
 * Helper functions that operate on any {@code Object}, and are not already provided in {@link
 * java.util.Objects}.
 *
 * <p>See the Guava User Guide on <a
 * href="https://github.com/google/guava/wiki/CommonObjectUtilitiesExplained">writing {@code Object}
 * methods with {@code MoreObjects}</a>.
 *
 * @author Laurence Gonsalves
 * @since 18.0 (since 2.0 as {@code Objects})
 */
@GwtCompatible
public final class MoreObjects {

/**
 * Helper functions that operate on any {@code Object}, and are not already provided in {@link
 * java.util.Objects}.
 *
 * <p>See the Guava User Guide on <a
 * href="https://github.com/google/guava/wiki/CommonObjectUtilitiesExplained">writing {@code Object}
 * methods with {@code MoreObjects}</a>.
 *
 * @author Laurence Gonsalves
 * @since 18.0 (since 2.0 as {@code Objects})
 */
@GwtCompatible
public final class MoreObjects {

This will only work with a versioned bucket, take a look at [Bucket Versioning Guide](https://docs.min.io/community/minio-object-store/administration/object-management/object-versioning.html) for more understanding.

### 3.1 Automatic removal of non current objects versions