Host. Java

/** Title: cloudsim toolkit * Description: cloudsim (cloud simulation) Toolkit for modeling and simulation of clouds * Licence: GPL-http://www.gnu.org/copyleft/gpl.html ** copyright (c) 2009-2010, the University of Melbourne, Australia */package Org. cloudid. cloudsim; import Java. util. arraylist; import Java. util. list; import Org. cloudid. cloudsim. lists. pelist; import Org. cloudid. cloudsim. provision ERS. bwprovisioner; import org. cloudid. cloudsim. provisioners. ramprovisioner;/*** host class * method: * Create, destroy Vm, and call the processing functions in VM to update cloud tasks. Migrate VM. * Host class extends a machine to include other hostlist beside PES * To Support Simulation of receivalized grids. it executes actions related * to management of virtual machines (e.g ., creation and destruction ). A host has * a defined policy for provisioning memory and BW, as well as an allocation policy * for PE's to virtual machines. ** a host is associated to a datacenter. it can host Vir Tual machines. ** @ authorrodrigo n. calheiros * @ authoranton beloglazov * @ sincecloudsim toolkit 1.0 */public class host {/** the ID. */private int ID;/** the storage. */private long storage;/** the ram provisioner. */private ramprovisioner;/** the BW provisioner. */private bwprovisioner;/** the allocation policy. it is mainly a PE list for pe vm allocation */private vmscheduler ;/** The VM list. */private list <? Extends VM> vmlist;/** the PE list. */private list <? Extends PE> pelist;/** tells whether this machine is working properly or has failed. */private Boolean failed;/** the VMS migrating in. */private list <VM> vmsmigratingin;/** the datacenter where the host is placed * The data center placed by the host **/private datacenter; /*** instantiates a new host. ** @ Param ID the ID * @ Param storage the storage * @ Param ramprovisioner the ram provisioner * @ Param B Wprovisioner the BW provisioner * @ Param pelist the PE list * @ Param vmscheduler the VM scheduler */public host (int id, ramprovisioner, describwprovisioner, long storage, list <? Extends PE> pelist, vmscheduler) {setid (ID); setramprovisioner (ramprovisioner); reverse (reverse); setstorage (storage); reverse (vmschedist); setpelist (pelist ); setvmlist (New arraylist <VM> (); setfailed (false );} /*** VM requests cloudlets to process updates * requests updating of processing of cloudlets In the VMS running in this host. ** @ Param currenttime the current time ** @ return expecte D time of completion of the next cloudlet in all VMS in this host. double. max_value * if there is no future events expected in this host ** @ pre currenttime >=0.0 * @ post $ none */Public double updatevmsprocessing (double currenttime) {double smallertime = double. max_value; For (Vm VM: getvmlist () {// For each VM on this host // If (VM. isinmigration () {// continue; //} // VM processes cloudlets with double time = VM. updatev Mprocessing (currenttime, getvmscheduler (). getallocatedmipsforvm (VM); If (Time> 0.0 & time <smallertime) {smallertime = Time ;}} return smallertime ;} /*** VM move to this host * @ Param VM */Public void addmigratinginvm (Vm VM) {If (! Getvmsmigratingin (). contains (VM) {// obtain the list vmsmigratingin to check whether this vmgetramprovisioner () exists (). allocateramforvm (Vm, VM. getcurrentrequestedram (); // allocate the memory getbwprovisioner (). allocatebwforvm (Vm, VM. getcurrentrequestedbw (); // allocate the bandwidth getvmsmigratingin (). add (VM) ;}}/*** VM removed from the host * @ Param VM */Public void removemigratinginvm (Vm VM) {getramprovisioner (). deallocateramforvm (VM); getbwprovisioner (). deallocatebwforvm (VM); GE Tvmsmigratingin (). Remove (VM );}/***?? */Public void reallocatemigratingvms () {for (Vm VM: getvmsmigratingin () {getramprovisioner (). allocateramforvm (Vm, VM. getcurrentrequestedram (); getbwprovisioner (). allocatebwforvm (Vm, VM. getcurrentrequestedbw () ;}}/*** checks if is suitable for VM. * check whether the VM is suitable for moving to the host, such as MIPS, ram, and BW * @ Param vm The VM ** @ return true, if is suitable for VM */Public Boolean issuitableforvm (Vm VM) {return (getvmsche DNT (). getavailablemips ()> = VM. getcurrentrequestedtotalmips () & getramprovisioner (). issuitableforvm (Vm, VM. getcurrentrequestedram () & getbwprovisioner (). issuitableforvm (Vm, VM. getcurrentrequestedbw ();}/*** allocates PES and memory to a new VM in the host. * Create a VM and check whether Ram, BW, and PES are sufficient. * @ Param VM being started ** @ return $ true if the VM cocould be started in the host; $ false otherwise ** @ pre $ None * @ post $ none */Public Boolean vmcreate (Vm VM) {If (! Getramprovisioner (). allocateramforvm (Vm, VM. getcurrentrequestedram () {log. printline ("Allocation of VM #" + VM. GETID () + "to host #" + GETID () + "failed by Ram"); Return false;} If (! Getbwprovisioner (). allocatebwforvm (Vm, VM. getcurrentrequestedbw () {log. printline ("Allocation of VM #" + VM. GETID () + "to host #" + GETID () + "failed by BW"); getramprovisioner (). deallocateramforvm (VM); Return false;} If (! Getvmscheduler (). allocatepesforvm (Vm, VM. getcurrentrequestedmips () {log. printline ("[vmscheduler. vmcreate] allocation of VM # "+ VM. GETID () + "to host #" + GETID () + "failed by MIPS"); getramprovisioner (). deallocateramforvm (VM); getbwprovisioner (). deallocatebwforvm (VM); Return false;} getvmlist (). add (VM); VM. sethost (this); Return true;}/*** destroy a VM * destroys a VM running in the host. ** @ Param VM th E vm ** @ pre $ none * @ post $ none */Public void vmdestroy (Vm VM) {If (Vm! = NULL) {vmdeallocate (VM); getvmlist (). remove (VM); VM. sethost (null) ;}}/*** destroy all VMS * destroys all VMS running in the host. ** @ pre $ none * @ post $ none */Public void vmdestroyall () {vmdeallocateall (); For (Vm VM: getvmlist () {VM. sethost (null);} getvmlist (). clear ();}/*** reclaim the memory, bandwidth, and PES * deallocate all hostlist for the VM. ** @ Param vm The VM */protected void vmdeallocate (Vm VM) {getramprovisio NER (). deallocateramforvm (VM); getbwprovisioner (). deallocatebwforvm (VM); getvmscheduler (). deallocatepesforvm (VM);}/*** reclaim the memory, bandwidth, and PES * deallocate all hostlist for the VM. ** @ Param vm The VM */protected void vmdeallocateall () {getramprovisioner (). deallocateramforallvms (); getbwprovisioner (). deallocatebwforallvms (); getvmscheduler (). deallocatepesforallvms ();}/*** returns a VM object. ** @ para M vmid the vm id * @ Param userid of VM's owner ** @ return the virtual machine object, $ null if not found ** @ pre $ none * @ post $ none */Public VM getvm (INT vmid, int userid) {for (Vm VM: getvmlist ()) {If (VM. GETID () = vmid & VM. getuserid () = userid) {return VM;} return NULL;}/*** gets the PES number. ** @ return the PES Number */Public int getpesnumber () {return getpelist (). size ();}/*** g ETS the free PES number. ** @ return the free PES Number */@ suppresswarnings ("unchecked") Public int getfreepesnumber () {return pelist. getfreepesnumber (list <PE>) getpelist ();}/*** gets the total MIPS. ** @ return the total MIPS */@ suppresswarnings ("unchecked") Public int gettotalmips () {return pelist. gettotalmips (list <PE>) getpelist ();}/*** a VM * allocates PES for a VM is not configured with PES. ** @ Param VM th E vm * @ Param mipsshare the MIPs share ** @ return $ true if this policy allows a new VM in the host, $ false otherwise ** @ pre $ none * @ post $ none */Public Boolean allocatepesforvm (Vm, list <double> mipsshare) {return getvmscheduler (). allocatepesforvm (Vm, mipsshare);}/*** releases PES allocated to a VM. * release a VM's PES * @ Param vm The VM ** @ pre $ none * @ post $ none */Public void deallocatepesforv M (Vm VM) {getvmscheduler (). deallocatepesforvm (VM);}/*** returns the MIPs share of each PE that is allocated to a given VM. * obtain MIPS * @ Param vm The VM ** @ return an array containing the amount of MIPs of each PE that is available to the VM ** @ pre $ none * @ post $ none */public list <double> getallocatedmipsforvm (Vm VM) {return getvmscheduler (). getallocatedmipsforvm (VM);}/*** gets the total alloc Ated MIPS for a VM over all the PES. ** @ Param vm The VM ** @ return the allocated MIPS for VM */Public double gettotalallocatedmipsforvm (Vm VM) {return getvmscheduler (). gettotalallocatedmipsforvm (VM);}/*** returns maximum available MIPS among all the PES. ** @ return Max MIPS */Public double getmaxavailablemips () {return getvmscheduler (). getmaxavailablemips ();}/*** gets the free MIPS. ** @ RET Urn the free MIPS */Public double getavailablemips () {return getvmscheduler (). getavailablemips ();}/*** gets the machine BW. ** @ return the machine BW ** @ pre $ none * @ post $ result> 0 */public long getbw () {return getbwprovisioner (). getbw ();}/*** gets the machine memory. ** @ return the machine memory ** @ pre $ none * @ post $ result> 0 */Public int getram () {return getramprovisioner (). getram () ;}/*** Gets the machine storage. ** @ return the machine storage ** @ pre $ none * @ post $ result> 0 */public long getstorage () {return storage;}/*** gets the ID. ** @ return the ID */Public int GETID () {return ID;}/*** sets the ID. ** @ Param ID the new ID */protected void setid (int id) {This. id = ID;}/*** gets the ram provisioner. ** @ return the ram provisioner */Public ramprovisioner getram Provisioner () {return ramprovisioner;}/*** sets the ram provisioner. ** @ Param ramprovisioner the new RAM provisioner */protected void setramprovisioner (ramprovisioner) {This. ramprovisioner = ramprovisioner;}/*** gets the BW provisioner. ** @ return the BW provisioner */Public bwprovisioner getbwprovisioner () {return bwprovisioner;}/*** sets the BW provisioner. ** @ Param bwprov Isioner the new BW provisioner */protected void setbwprovisioner (bwprovisioner) {This. bwprovisioner = bwprovisioner;}/*** gets the VM scheduler. ** @ return the VM scheduler */protected vmscheduler getvmscheduler () {return vmschedsets;}/*** sets the VM schedsets. ** @ Param vmscheduler the VM scheduler */protected void setvmscheduler (vmscheduler) {This. vmscheduler = VMS Cheduler;}/*** gets the PE list. ** @ return the PE list */public list <? Extends PE> getpelist () {return this. pelist;}/*** sets the PE list. ** @ Param pelist the new PE list */protected void setpelist (list <? Extends PE> pelist) {This. pelist = pelist;}/*** gets the VM list. ** @ return the VM list */@ suppresswarnings ("unchecked") Public <t extends VM> List <t> getvmlist () {return (list <t>) vmlist ;} /*** sets the VM list. ** @ Param vmlist the new VM list */protected <t extends VM> void setvmlist (list <t> vmlist) {This. vmlist = vmlist;}/*** sets the storage. ** @ Param storage the new storage */protected void setstorage (long storage) {This. storage = storage;}/*** checks if is failed. ** @ return true, if is failed */Public Boolean isfailed () {return failed ;} /*** set the status of all PES on this machine to failed * sets the PES of this machine to a failed status. * Note: <tt> resname </tt> is used for debugging purposes, * which is <B> On </B> by default. * use {@ link # setfailed (Boolean)} If you do not want * this information. ** @ Param resname The Name Of The resource * @ Param failed the failed ** @ return <tt> true </tt> If successful, <tt> false </tt> otherwise */@ suppresswarnings ("unchecked") Public Boolean setfailed (string resname, Boolean failed) {// all the PES are failed (or recovered, depending on fail) This. failed = failed; pelist. setstatusfailed (list <PE>) getpelist (), resname, GETID (), failed); Return true ;} /*** set PES to failed * sets the PES of this machine to a failed status. ** @ Param failed the failed ** @ return <tt> true </tt> If successful, <tt> false </tt> otherwise */@ suppresswarnings ("unchecked ") public Boolean setfailed (Boolean failed) {// all the PES are failed (or recovered, depending on fail) This. failed = failed; pelist. setstatusfailed (list <PE>) getpelist (), failed); Return true;}/*** sets the participating PE status on this machine. ** @ Param status PE status, either <tt> PE. free </tt> or <tt> PE. busy </tt> * @ Param peid the pe id ** @ return <tt> true </tt> If the PE status has changed, <tt> false </tt> * otherwise (pe id might not be exist) ** @ pre peid> = 0 * @ post $ none */@ suppresswarnings ("unchecked ") public Boolean setpestatus (INT peid, int status) {return pelist. setpestatus (list <PE>) getpelist (), peid, status);}/*** gets the VMS migrating in. * obtain the list of VMS to be migrated * @ return the VMS migrating in */public list <VM> getvmsmigratingin () {return vmsmigratingin;}/*** sets the VMS migrating in. ** @ Param vmsmigratingin the new VMS migrating in */protected void setvmsmigratingin (list <VM> vmsmigratingin) {This. vmsmigratingin = vmsmigratingin;}/*** gets the data center. * @ return the data center where the host runs */Public datacenter getdatacenter () {return this. datacenter;}/*** sets the data center. ** @ Param datacenter the data center from this host */Public void setdatacenter (datacenter) {This. datacenter = datacenter ;}}