buf.append("propertyName=")
                .append(propertyName)
                .append(",propertyType=")
                .append(propertyType.getName())
                .append(",readMethod=")
                .append(readMethod != null ? readMethod.getName() : "null")
                .append(",writeMethod=")
                .append(writeMethod != null ? writeMethod.getName() : "null");

        assertNotNull(referral, "The DfsReferral object should not be null.");
        assertEquals(referral, referral.next, "The 'next' property should point to the object itself.");
    }

    /**
     * Tests the append method of the DfsReferral class.
     * It verifies that a new DfsReferral object can be successfully appended to an existing one,
     * forming a linked list structure.
     */
    @Test
    void testAppend() {

        final StringBuilder queryBuf = new StringBuilder(query.length() + 2);
        if (!query.startsWith("*")) {
            queryBuf.append('*');
        }
        queryBuf.append(toLowercaseWildcard(query));
        if (!query.endsWith("*")) {
            queryBuf.append('*');
        }
        final String origQuery = queryBuf.toString();
        context.addFieldLog(Constants.DEFAULT_FIELD, origQuery);

     * @return new referral, combining a chain of referrals
     */
    DfsReferralDataInternal combine(DfsReferralData next);

    /**
     * Append another referral to this referral chain
     *
     * @param dr the referral to append
     */
    void append(DfsReferralDataInternal dr);

    }

    public void test_veryLongMessage() {
        // Test with very long message
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < 1000; i++) {
            sb.append("Very long error message line ").append(i).append(". ");
        }
        String longMessage = sb.toString();

        GsaConfigException exception = new GsaConfigException(longMessage);

        assertNotNull(exception);

<img src="/img/tutorial/websockets/image03.png">

여러 메시지를 전송(그리고 수신)할 수 있습니다:

<img src="/img/tutorial/websockets/image04.png">

모든 메시지는 동일한 WebSocket 연결을 사용합니다.

## `Depends` 및 기타 사용하기

WebSocket 엔드포인트에서 `fastapi`에서 다음을 가져와 사용할 수 있습니다:

* `Depends`
* `Security`
* `Cookie`
* `Header`
* `Path`
* `Query`

이들은 다른 FastAPI 엔드포인트/*경로 작동*과 동일하게 동작합니다:

        } catch (final Exception e) {
            logger.error("Could not delete expired documents: {}", queryBuilder, e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        return resultBuf.toString();
    }

        sb.append('[');
        if (this.unc != null) {
            sb.append("unc=");
            sb.append(this.unc);
        }
        if (this.canon != null) {
            sb.append("canon=");
            sb.append(this.canon);
        }
        if (this.dfsReferral != null) {
            sb.append("dfsReferral=");
            sb.append(this.dfsReferral);
        }

	bs.mu.Lock()
	defer bs.mu.Unlock()

	if len(bs.info) > bootstrapTraceLimit {
		return
	}
	bs.info = append(bs.info, info)
}

func (bs *bootstrapTracer) Events() []madmin.TraceInfo {
	traceInfo := make([]madmin.TraceInfo, 0, bootstrapTraceLimit)

	bs.mu.RLock()
	traceInfo = append(traceInfo, bs.info...)
	bs.mu.RUnlock()

	return traceInfo
}

	case []string:
		tx.Statement.Selects = v

		for _, arg := range args {
			switch arg := arg.(type) {
			case string:
				tx.Statement.Selects = append(tx.Statement.Selects, arg)
			case []string:
				tx.Statement.Selects = append(tx.Statement.Selects, arg...)
			default:
				tx.AddError(fmt.Errorf("unsupported select args %v %v", query, args))
				return
			}
		}