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<h:commandButton value="Save">
    <f:ajax event="click" listener="#{bean.save}"/>
</h:commandButton>

public void save(){
    log.debug("Save executed!");
}

<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:c="http://java.sun.com/jstl/core">
<ui:define name="body">
<h:link outcome="agreementDetail.xhtml" value="EA-15558">
                <f:param name="serviceId" value="EA-15558" />
                <f:param name="site" value="NIC" />
            </h:link>
 </ui:define>

</html>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml"
          xmlns:ui="http://java.sun.com/jsf/facelets"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:h="http://java.sun.com/jsf/html"
          xmlns:c="http://java.sun.com/jstl/core">

             <f:view>
                <f:event type="preRenderView" listener="#{agreement.build}"/>
            </f:view>
  <ui:define name="body">
    <f:view>
                    <h:form>
    <h:commandButton value="Save" action="#{agreement.save}">
                            <f:ajax/>
                        </h:commandButton><br/><br/>
    <h:dataTable value="#{agreement.licenseServerNames}" var="licenseServerName">
                            <h:column>
                                <h:inputText value="#{licenseServerName}"/>
                            </h:column>
                        </h:dataTable>
</h:form>
            </f:view>
  </ui:define>


</html>

@ManagedBean(name="agreement")
@RequestScoped
public class AgreementBean {

@ManagedProperty("#{param.serviceId}")
    private String serviceId;

    @ManagedProperty("#{param.site}")
    private String site;

private List<String> licenseServerNames; //GETTERS AND SETTERS OMITTED TO AVOID EXCESS CODE

@PostConstruct
    public void build(){
        logger.debug("START");
        methodOne();
                logger.debug("END");
    }

public void save(){
        logger.debug("SAVE!!!!!");
        for(String name : licenseServerNames){
            logger.debug("Servername = "+name);
        }
    }
}

<h:commandButton id="ajax" value="Save" action="{agreement.save}" >
                            <f:ajax execute="@form" render="@form" />
              </h:commandButton>
            <h:outputScript rendered="#{agreement.show}">alert("save");</h:outputScript>