mer cial ▁vehicles ▁Category : Car ▁body ▁styles <0x0A> </s> ▁Apache ▁Active MQ ▁is ▁an ▁open ▁source ▁message ▁bro ker ▁written ▁in ▁Java ▁together ▁with ▁a ▁full ▁Java ▁Message ▁Service ▁( J MS ) ▁client . ▁It ▁provides ▁" Enter prise ▁Fe atures " ▁which ▁in ▁this ▁case ▁means ▁fost ering ▁the ▁communication ▁from ▁more ▁than ▁one ▁client ▁or ▁server . ▁Support ed ▁clients ▁include ▁Java ▁via ▁J MS ▁ 1 . 1 ▁as ▁well ▁as ▁several ▁other ▁" cross ▁language " ▁clients . ▁The ▁communication ▁is ▁managed ▁with ▁features ▁such ▁as ▁computer ▁clust ering ▁and ▁ability ▁to ▁use ▁any ▁database ▁as ▁a ▁J MS ▁pers istence ▁provider ▁besides ▁virtual ▁memory , ▁cache , ▁and ▁journal ▁persist ency . ▁ ▁The ▁Active MQ ▁project ▁was ▁originally ▁created ▁by ▁its ▁found ers ▁from ▁Log ic B la ze ▁in ▁ 2 0 0 4 , ▁as ▁an ▁open ▁source ▁message ▁bro ker , ▁hosted ▁by ▁Code H aus . ▁The ▁code ▁and ▁Active MQ ▁tra dem ark ▁were ▁don ated ▁to ▁the ▁Apache ▁Software ▁Foundation ▁in ▁ 2 0 0 7 , ▁where ▁the ▁found ers ▁continued ▁to ▁develop ▁the ▁code base ▁with ▁the ▁extended ▁Apache ▁community . ▁ ▁Active MQ ▁emp lo ys ▁several ▁modes ▁for ▁high ▁avail ability , ▁including ▁both ▁file - system ▁and ▁database ▁row - level ▁lock ing ▁mechan isms , ▁sharing ▁of ▁the ▁pers istence ▁store ▁via ▁a ▁shared ▁filesystem , ▁or ▁true ▁rep lication ▁using ▁Apache ▁Z oo K ee per . ▁ ▁A ▁robust ▁horizontal ▁scaling