src/main/java/org/apache/commons/dbcp2/PoolableConnectionFactory.java [813:837]:
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        this.validationQuery = validationQuery;
    }

    /**
     * Sets the validation query timeout, the amount of time, that connection validation will wait for a response from the
     * database when executing a validation query. Use a value less than or equal to 0 for no timeout.
     *
     * @param validationQueryTimeoutDuration new validation query timeout duration.
     * @since 2.10.0
     */
    public void setValidationQueryTimeout(final Duration validationQueryTimeoutDuration) {
        this.validationQueryTimeoutDuration = validationQueryTimeoutDuration;
    }

    /**
     * Sets the validation query timeout, the amount of time, in seconds, that connection validation will wait for a
     * response from the database when executing a validation query. Use a value less than or equal to 0 for no timeout.
     *
     * @param validationQueryTimeoutSeconds
     *            new validation query timeout value in seconds
     * @deprecated {@link #setValidationQueryTimeout(Duration)}.
     */
    @Deprecated
    public void setValidationQueryTimeout(final int validationQueryTimeoutSeconds) {
        this.validationQueryTimeoutDuration = Duration.ofSeconds(validationQueryTimeoutSeconds);
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src/main/java/org/apache/commons/dbcp2/datasources/InstanceKeyDataSource.java [1222:1244]:
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        this.validationQuery = validationQuery;
    }

    /**
     * Sets the timeout duration before the validation query fails.
     *
     * @param validationQueryTimeoutDuration
     *            The new timeout duration.
     */
    public void setValidationQueryTimeout(final Duration validationQueryTimeoutDuration) {
        this.validationQueryTimeoutDuration = validationQueryTimeoutDuration;
    }

    /**
     * Sets the timeout in seconds before the validation query fails.
     *
     * @param validationQueryTimeoutSeconds
     *            The new timeout in seconds
     * @deprecated Use {@link #setValidationQueryTimeout(Duration)}.
     */
    @Deprecated
    public void setValidationQueryTimeout(final int validationQueryTimeoutSeconds) {
        this.validationQueryTimeoutDuration = Duration.ofSeconds(validationQueryTimeoutSeconds);
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