| 1 | <accessor debug="false"> |
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| 2 | <name>ISOcat.access.data.lock.new</name> |
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| 3 | <descr>Create a new lock.</descr> |
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| 4 | <param mandatory="true"> |
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| 5 | <name>session</name> |
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| 6 | <descr>the session to which the new lock belongs</descr> |
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| 7 | </param> |
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| 8 | <param mandatory="true"> |
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| 9 | <name>ltype</name> |
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| 10 | <descr>the lock type</descr> |
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| 11 | </param> |
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| 12 | <param mandatory="true"> |
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| 13 | <name>object</name> |
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| 14 | <descr>the object to lock</descr> |
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| 15 | </param> |
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| 16 | <idoc> |
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| 17 | <instr> |
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| 18 | <type>copy</type> |
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| 19 | <operand>var:session</operand> |
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| 20 | <target>var:sid</target> |
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| 21 | </instr> |
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| 22 | <instr> |
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| 23 | <type>ISOcat.access.data.session</type> |
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| 24 | <session>var:sid</session> |
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| 25 | <target>var:session</target> |
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| 26 | </instr> |
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| 27 | <accessor-debug> |
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| 28 | <instr> |
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| 29 | <type>copy</type> |
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| 30 | <operand>var:session</operand> |
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| 31 | <target>ffcpl:/trace/lock_new.session.xml</target> |
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| 32 | </instr> |
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| 33 | </accessor-debug> |
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| 34 | <!-- CHECK: can this user acquire a lock on this object? --> |
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| 35 | <choose> |
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| 36 | <cond> |
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| 37 | <instr> |
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| 38 | <type>xpath2eval</type> |
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| 39 | <operand>var:ltype</operand> |
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| 40 | <operator> |
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| 41 | <xpath>.='data category'</xpath> |
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| 42 | </operator> |
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| 43 | <target>this:cond</target> |
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| 44 | </instr> |
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| 45 | </cond> |
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| 46 | <then> |
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| 47 | <instr> |
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| 48 | <type>sloot.xpath2eval</type> |
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| 49 | <operand>var:session</operand> |
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| 50 | <operator> |
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| 51 | <xpath>/session/owner/@user</xpath> |
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| 52 | </operator> |
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| 53 | <param> |
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| 54 | <return> |
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| 55 | <canonical/> |
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| 56 | <string/> |
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| 57 | </return> |
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| 58 | </param> |
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| 59 | <target>var:user</target> |
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| 60 | </instr> |
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| 61 | <instr> |
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| 62 | <type>sloot.debug</type> |
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| 63 | <debug>var:accessor-debug</debug> |
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| 64 | <operand>var:user</operand> |
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| 65 | </instr> |
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| 66 | <instr> |
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| 67 | <type>ISOcat.access.data.user.all</type> |
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| 68 | <user>var:user</user> |
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| 69 | <target>var:workspace</target> |
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| 70 | </instr> |
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| 71 | <accessor-debug> |
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| 72 | <instr> |
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| 73 | <type>copy</type> |
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| 74 | <operand>var:workspace</operand> |
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| 75 | <target>ffcpl:/trace/lock_new.ws.xml</target> |
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| 76 | </instr> |
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| 77 | </accessor-debug> |
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| 78 | <instr> |
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| 79 | <type>sloot.xquery</type> |
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| 80 | <operator> |
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| 81 | <xquery> |
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| 82 | declare variable $dc as node() external; |
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| 83 | declare variable $ws as node() external; |
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| 84 | <b>{ |
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| 85 | if (contains($ws//dc[@ref=string($dc)]/@mode,'w')) |
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| 86 | then ('t') |
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| 87 | else ('f') |
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| 88 | }</b> |
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| 89 | </xquery> |
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| 90 | </operator> |
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| 91 | <dc>var:object</dc> |
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| 92 | <ws>var:workspace</ws> |
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| 93 | <target>var:access</target> |
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| 94 | </instr> |
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| 95 | <accessor-debug> |
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| 96 | <instr> |
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| 97 | <type>log</type> |
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| 98 | <operand>var:access</operand> |
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| 99 | </instr> |
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| 100 | </accessor-debug> |
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| 101 | </then> |
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| 102 | <else> |
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| 103 | <instr> |
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| 104 | <type>sloot.log</type> |
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| 105 | <operand> |
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| 106 | <msg>ERR: requesting a lock of an unknown type</msg> |
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| 107 | </operand> |
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| 108 | </instr> |
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| 109 | <instr> |
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| 110 | <type>copy</type> |
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| 111 | <operand> |
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| 112 | <b>f</b> |
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| 113 | </operand> |
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| 114 | <target>var:access</target> |
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| 115 | </instr> |
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| 116 | </else> |
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| 117 | </choose> |
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| 118 | <if> |
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| 119 | <cond> |
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| 120 | <instr> |
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| 121 | <type>sloot.not</type> |
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| 122 | <operand>var:access</operand> |
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| 123 | <target>this:cond</target> |
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| 124 | </instr> |
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| 125 | </cond> |
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| 126 | <then> |
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| 127 | <instr> |
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| 128 | <type>throw</type> |
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| 129 | <operand> |
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| 130 | <ex> |
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| 131 | <id>ISOcat[FORBIDDEN]</id> |
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| 132 | <message>This user isn't allowed to carry out this action.</message> |
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| 133 | </ex> |
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| 134 | </operand> |
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| 135 | </instr> |
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| 136 | </then> |
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| 137 | </if> |
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| 138 | <!-- create the new lock, which will fail if the object is already locked --> |
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| 139 | <instr> |
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| 140 | <type>isocat.sqlQuery</type> |
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| 141 | <operand> |
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| 142 | <sql> |
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| 143 | SELECT nextval('generic_lock_id_seq'::regclass) AS lid; |
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| 144 | </sql> |
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| 145 | </operand> |
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| 146 | <target>var:lid</target> |
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| 147 | </instr> |
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| 148 | <instr> |
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| 149 | <type>sloot.xpath2eval</type> |
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| 150 | <operand>var:lid</operand> |
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| 151 | <operator> |
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| 152 | <xpath>/results/row/lid</xpath> |
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| 153 | </operator> |
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| 154 | <param> |
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| 155 | <return> |
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| 156 | <canonical/> |
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| 157 | <string/> |
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| 158 | </return> |
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| 159 | </param> |
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| 160 | <target>var:lid</target> |
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| 161 | </instr> |
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| 162 | <instr> |
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| 163 | <type>sloot.xquery</type> |
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| 164 | <operator> |
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| 165 | <xquery> |
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| 166 | declare variable $lid as node() external; |
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| 167 | declare variable $sid as node() external; |
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| 168 | declare variable $tpe as node() external; |
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| 169 | declare variable $lck as node() external; |
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| 170 | <sql> |
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| 171 | INSERT INTO |
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| 172 | generic_lock |
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| 173 | ( |
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| 174 | id, |
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| 175 | "session", |
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| 176 | "type", |
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| 177 | "lock" |
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| 178 | ) |
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| 179 | VALUES |
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| 180 | ( |
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| 181 | {string($lid)}, |
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| 182 | {string($sid)}, |
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| 183 | '{replace(string($tpe),"'","''")}', |
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| 184 | {string($lck)} |
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| 185 | ) |
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| 186 | ; |
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| 187 | </sql> |
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| 188 | </xquery> |
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| 189 | </operator> |
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| 190 | <lid>var:lid</lid> |
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| 191 | <sid>var:sid</sid> |
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| 192 | <tpe>var:ltype</tpe> |
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| 193 | <lck>var:object</lck> |
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| 194 | <target>var:sql</target> |
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| 195 | </instr> |
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| 196 | <accessor-debug> |
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| 197 | <instr> |
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| 198 | <type>copy</type> |
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| 199 | <operand>var:sql</operand> |
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| 200 | <target>ffcpl:/trace/lock_new.sql.xml</target> |
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| 201 | </instr> |
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| 202 | </accessor-debug> |
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| 203 | <instr> |
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| 204 | <type>isocat.sqlUpdate</type> |
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| 205 | <operand>var:sql</operand> |
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| 206 | <target>var:result</target> |
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| 207 | </instr> |
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| 208 | <accessor-debug> |
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| 209 | <instr> |
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| 210 | <type>copy</type> |
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| 211 | <operand>var:result</operand> |
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| 212 | <target>ffcpl:/trace/lock_new.result.xml</target> |
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| 213 | </instr> |
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| 214 | </accessor-debug> |
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| 215 | <!-- get the lock --> |
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| 216 | <instr> |
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| 217 | <type>ISOcat.access.data.lock</type> |
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| 218 | <lock>var:lid</lock> |
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| 219 | <register> |
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| 220 | <b>f</b> |
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| 221 | </register> |
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| 222 | <target>var:lock</target> |
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| 223 | </instr> |
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| 224 | <!-- log the lock --> |
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| 225 | <instr> |
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| 226 | <type>xslt2</type> |
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| 227 | <operand>var:lock</operand> |
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| 228 | <operator> |
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| 229 | <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0"> |
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| 230 | <xsl:template match="/lock"> |
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| 231 | <msg>INF: <xsl:value-of select="current-dateTime()"/>: new session[<xsl:value-of select="session"/>] lock[<xsl:value-of select="id"/>] <xsl:value-of select="type"/>[<xsl:value-of select="object"/>]</msg> |
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| 232 | </xsl:template> |
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| 233 | </xsl:stylesheet> |
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| 234 | </operator> |
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| 235 | <target>var:msg</target> |
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| 236 | </instr> |
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| 237 | <instr> |
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| 238 | <type>sloot.log</type> |
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| 239 | <operand>var:msg</operand> |
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| 240 | </instr> |
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| 241 | <!-- return the lock --> |
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| 242 | <instr> |
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| 243 | <type>copy</type> |
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| 244 | <operand>var:lock</operand> |
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| 245 | <target>this:response</target> |
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| 246 | </instr> |
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| 247 | <exception> |
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| 248 | <choose> |
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| 249 | <cond> |
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| 250 | <instr> |
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| 251 | <type>xpath2eval</type> |
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| 252 | <operand>this:exception</operand> |
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| 253 | <operator> |
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| 254 | <xpath>starts-with(/ex/message,'duplicate key value violates unique constraint')</xpath> |
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| 255 | </operator> |
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| 256 | <target>this:cond</target> |
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| 257 | </instr> |
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| 258 | </cond> |
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| 259 | <then> |
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| 260 | <!-- we failed to acquire the lock, we'll return some info on the current lock --> |
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| 261 | <instr> |
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| 262 | <type>isocat.sloot.dbx</type> |
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| 263 | <ltype>var:ltype</ltype> |
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| 264 | <object>var:object</object> |
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| 265 | <operator>ffcpl:/dbx/session-nolock.xml</operator> |
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| 266 | <debug>var:accessor-debug</debug> |
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| 267 | <target>this:response</target> |
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| 268 | </instr> |
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| 269 | </then> |
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| 270 | <else> |
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| 271 | <instr> |
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| 272 | <instr>throw</instr> |
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| 273 | <operand>this:exception</operand> |
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| 274 | </instr> |
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| 275 | </else> |
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| 276 | </choose> |
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| 277 | </exception> |
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| 278 | </idoc> |
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| 279 | <exception> |
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| 280 | <debug/> |
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| 281 | <trace>ffcpl:/trace/lock_new.exception.xml</trace> |
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| 282 | <throw/> |
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| 283 | </exception> |
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| 284 | <response> |
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| 285 | <debug>ffcpl:/trace/lock_new.response.xml</debug> |
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| 286 | <mime>application/xml</mime> |
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| 287 | <expire>now</expire> |
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| 288 | </response> |
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| 289 | </accessor> |
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