sshd-core/src/main/java/org/apache/sshd/common/channel/AbstractChannel.java [494:511]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    public void addChannelListener(ChannelListener listener) {
        ChannelListener.validateListener(listener);
        // avoid race conditions on notifications while channel is being closed
        if (!isOpen()) {
            log.warn("addChannelListener({})[{}] ignore registration while channel is closing", this, listener);
            return;
        }

        if (this.channelListeners.add(listener)) {
            if (log.isTraceEnabled()) {
                log.trace("addChannelListener({})[{}] registered", this, listener);
            }
        } else {
            if (log.isTraceEnabled()) {
                log.trace("addChannelListener({})[{}] ignored duplicate", this, listener);
            }
        }
    }
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



sshd-core/src/main/java/org/apache/sshd/common/helpers/AbstractFactoryManager.java [387:405]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    public void addChannelListener(ChannelListener listener) {
        ChannelListener.validateListener(listener);

        // avoid race conditions on notifications while manager is being closed
        if (!isOpen()) {
            log.warn("addChannelListener({})[{}] ignore registration while session is closing", this, listener);
            return;
        }

        if (this.channelListeners.add(listener)) {
            if (log.isTraceEnabled()) {
                log.trace("addChannelListener({})[{}] registered", this, listener);
            }
        } else {
            if (log.isTraceEnabled()) {
                log.trace("addChannelListener({})[{}] ignored duplicate", this, listener);
            }
        }
    }
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



sshd-core/src/main/java/org/apache/sshd/common/session/helpers/AbstractSession.java [2266:2283]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    public void addChannelListener(ChannelListener listener) {
        ChannelListener.validateListener(listener);
        // avoid race conditions on notifications while session is being closed
        if (!isOpen()) {
            log.warn("addChannelListener({})[{}] ignore registration while session is closing", this, listener);
            return;
        }

        if (this.channelListeners.add(listener)) {
            if (log.isTraceEnabled()) {
                log.trace("addChannelListener({})[{}] registered", this, listener);
            }
        } else {
            if (log.isTraceEnabled()) {
                log.trace("addChannelListener({})[{}] ignored duplicate", this, listener);
            }
        }
    }
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -