code: @Override
      public boolean init() {
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "App channel called init: " + this);
          }
          int cbState = CALLBACK_STATE_IDLE;
          int myState = READ_STATE_IDLE;
          // grab the read-ahead states in a sync block to avoid timing windows
          // with the callback kicking in at the same time
          if (isReadAheadEnabled()) {
              getReadCancel().init();
              if (!super.cancelOutstandingRead()) {
                  // failed to start (not supported at TCP layer perhaps)
                  getReadCancel().clear();
                  return false;
              } else if (!getReadCancel().block(2000L)) {
                  // failed to succeed on the cancel attempt
                  return false;
              }
              synchronized (this.stateSyncObject) {
                  cbState = getCallbackState();
                  myState = getReadState();
                  setReadState(READ_STATE_TIME_RESET);
              }
          }
          if (CALLBACK_STATE_IDLE == cbState) {
              // no read ahead involved here
              return true;
          }
          if (CALLBACK_STATE_PENDING != cbState) {
              // read-ahead callback has already been triggered, this must fail
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "Callback state indicates error: " + cbState);
              }
              return false;
          }
          if (READ_STATE_IDLE != myState) {
              // read-for-response thread state isn't valid for this method
              if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
                  Tr.debug(tc, "Read for response state indicates error: " + myState);
              }
              return false;
          }
          return true;
      }
docs: /*
  @see com.ibm.wsspi.http.channel.outbound.HttpOutboundServiceContext#init()