module Mongo::Operation::SessionsSupported
Shared behavior of operations that support a session.
@since 2.5.2
Constants
- READ_COMMANDS
- ZERO_TIMESTAMP
Private Instance Methods
add_write_concern!(sel)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 90 def add_write_concern!(sel) sel[:writeConcern] = write_concern.options if write_concern end
apply_autocommit!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 94 def apply_autocommit!(selector) session.add_autocommit!(selector) end
apply_causal_consistency!(selector, server)
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Adds causal consistency document to the selector, if one can be constructed and the selector is for a startTransaction command.
When operations are performed in a transaction, only the first operation (the one which starts the transaction via startTransaction) is allowed to have a read concern, and with it the causal consistency document, specified.
# File lib/mongo/operation/shared/sessions_supported.rb, line 48 def apply_causal_consistency!(selector, server) return unless selector[:startTransaction] apply_causal_consistency_if_possible(selector, server) end
apply_causal_consistency_if_possible(selector, server)
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Adds causal consistency document to the selector, if one can be constructed.
In order for the causal consistency document to be constructed, causal consistency must be enabled for the session and the session must have the current operation time. Also, topology must be replica set or sharded cluster.
# File lib/mongo/operation/shared/sessions_supported.rb, line 61 def apply_causal_consistency_if_possible(selector, server) if !server.standalone? cc_doc = session.send(:causal_consistency_doc) if cc_doc selector[:readConcern] = (selector[:readConcern] || read_concern || {}).merge(cc_doc) end end end
apply_cluster_time!(selector, server)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 74 def apply_cluster_time!(selector, server) if !server.standalone? cluster_time = [server.cluster_time, (session && session.cluster_time)].max_by do |doc| (doc && doc[Cluster::CLUSTER_TIME]) || ZERO_TIMESTAMP end if cluster_time && (cluster_time[Cluster::CLUSTER_TIME] > ZERO_TIMESTAMP) selector[CLUSTER_TIME] = cluster_time end end end
apply_read_pref!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 110 def apply_read_pref!(selector) session.apply_read_pref!(selector) if read_command?(selector) end
apply_session_id!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 98 def apply_session_id!(selector) session.add_id!(selector) end
apply_start_transaction!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 102 def apply_start_transaction!(selector) session.add_start_transaction!(selector) end
apply_txn_num!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 106 def apply_txn_num!(selector) session.add_txn_num!(selector) end
apply_txn_opts!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 114 def apply_txn_opts!(selector) session.add_txn_opts!(selector, read_command?(selector)) end
command(server)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 130 def command(server) sel = selector(server).dup add_write_concern!(sel) sel[Protocol::Msg::DATABASE_IDENTIFIER] = db_name sel['$readPreference'] = read.to_doc if read if server.features.sessions_enabled? apply_cluster_time!(sel, server) if session && (acknowledged_write? || session.in_transaction?) sel[:txnNumber] = BSON::Int64.new(txn_num) if txn_num apply_session_id!(sel) apply_start_transaction!(sel) apply_causal_consistency!(sel, server) apply_autocommit!(sel) apply_txn_opts!(sel) suppress_read_write_concern!(sel) validate_read_preference!(sel) update_session_state! apply_txn_num!(sel) end elsif session && session.explicit? apply_cluster_time!(sel, server) sel[:txnNumber] = BSON::Int64.new(txn_num) if txn_num apply_session_id!(sel) apply_start_transaction!(sel) apply_causal_consistency!(sel, server) apply_autocommit!(sel) apply_txn_opts!(sel) suppress_read_write_concern!(sel) validate_read_preference!(sel) update_session_state! apply_txn_num!(sel) end sel end
flags()
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# File lib/mongo/operation/shared/sessions_supported.rb, line 70 def flags acknowledged_write? ? [] : [:more_to_come] end
read_command?(sel)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 86 def read_command?(sel) READ_COMMANDS.any? { |c| sel[c] } end
suppress_read_write_concern!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 118 def suppress_read_write_concern!(selector) session.suppress_read_write_concern!(selector) end
update_session_state!()
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# File lib/mongo/operation/shared/sessions_supported.rb, line 126 def update_session_state! session.update_state! end
validate_read_preference!(selector)
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# File lib/mongo/operation/shared/sessions_supported.rb, line 122 def validate_read_preference!(selector) session.validate_read_preference!(selector) if read_command?(selector) end