<17.2>

Waiting

C_nego(1)

<18.2>

Compensate

Communication with Transaction Broker

C_trans(1)

<19.2>

Compensate

Communication with Service Providers

C_trans(1)

(<20.2>)

Data Exchanges (Request)

Communication with Service Providers

(C_trans(1))

<21.2>

Data Manipulate

Internal Process at Service Providers

C_dm(1)

(<22.2>)

Data Exchanges (Response)

Communication with Service Providers

(C_trans(1))

(<23.2>)

2 PC Procedures

C_trans(4)

<24.2>

(Compensated)

Communication with Service Providers

C_trans(1)

<25.2>

Compensated

Communication with Transaction Broker

C_trans(1)

<26.2>

(Safepoint)

Communication with Monitor

C_cm(1)

<27.2>

Return

Internal Process at Transaction Requestor

C_inter(1)