import org.projectfloodlight.openflow.protocol.OFTableFeaturesStatsRequest; //导入依赖的package包/类
/**
 * send a table features request
 */
private void sendHandshakeTableFeaturesRequest() {
	OFTableFeaturesStatsRequest tfsr = factory.buildTableFeaturesStatsRequest()
			/* leave entries blank --> just ask, don't set */
			.setXid(handshakeTransactionIds--)
			.build();
	mainConnection.write(tfsr);
}
 

import org.projectfloodlight.openflow.protocol.OFTableFeaturesStatsRequest; //导入依赖的package包/类
public void handleDescStatsAndCreateSwitch() throws Exception {
    // build the stats reply
    OFDescStatsReply sr = createDescriptionStatsReply();

    reset(sw);
    SwitchDescription switchDescription = new SwitchDescription(sr);
    setupSwitchForInstantiationWithReset();
    sw.setPortDescStats(anyObject(OFPortDescStatsReply.class));
    expectLastCall().once();
   
    expect(sw.getOFFactory()).andReturn(factory).once();
    replay(sw);

    reset(switchManager);
    expect(switchManager.getHandshakePlugins()).andReturn(plugins).anyTimes();
    expect(
           switchManager.getOFSwitchInstance(anyObject(OFConnection.class),
                                          eq(switchDescription),
                                          anyObject(OFFactory.class),
                                          anyObject(DatapathId.class))).andReturn(sw).once();
    expect(switchManager.getNumRequiredConnections()).andReturn(1).anyTimes(); 
    switchManager.switchAdded(sw);
    expectLastCall().once();
    replay(switchManager);

    // send the description stats reply
    switchHandler.processOFMessage(sr);

    OFMessage msg = connection.retrieveMessage();
    assertThat(msg, CoreMatchers.instanceOf(OFTableFeaturesStatsRequest.class));
    verifyUniqueXids(msg);
    
    verify(sw, switchManager);
}