HeatbugModelSwarm中buildActions部分,3个try分别是做什么?查了下refbook-java-2.2,解释太简略,还是不懂,高手指点,谢谢!代码如下:3 ]/ [, j. A$ u0 r/ R7 S3 `; O, m1 Q
8 \7 L/ Z! N4 P2 ~. B9 o8 V1 u4 O public Object buildActions () {
6 v0 C- A/ K6 F r* Z/ e* P super.buildActions();
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/ B4 z8 A+ o5 E& b& a% Z7 ~4 n2 Q // Create the list of simulation actions. We put these in
* R5 Z/ p/ H5 g8 Q" f/ V% J // an action group, because we want these actions to be* T4 l: C; @0 K& F
// executed in a specific order, but these steps should: I0 C% i; h1 X5 U
// take no (simulated) time. The M(foo) means "The message m' T8 t2 W5 G; X6 J! n, {
// called <foo>". You can send a message To a particular6 Y* ]) U# ]) N! ^
// object, or ForEach object in a collection.* W8 ~8 _3 |2 Y8 _7 ?3 G- q0 Z
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// Note we update the heatspace in two phases: first run
9 X# t" i5 g* I. N$ A3 F8 M# p // diffusion, then run "updateWorld" to actually enact the/ j' R2 _; M9 F, c
// changes the heatbugs have made. The ordering here is
- U2 ]: G% R1 D# s" v // significant!. o m# S- M, r, q8 L: [
1 B* U! _: y d% \1 T // Note also, that with the additional' ]* K( h: L9 V+ h* b/ w7 k
// `randomizeHeatbugUpdateOrder' Boolean flag we can! C- w5 o% z" `$ I+ q4 B% K: [
// randomize the order in which the bugs actually run
7 W- F! U9 u: V8 Y/ ?4 `1 u! \ // their step rule. This has the effect of removing any
& c) ?; c; m% M" Y Q* T // systematic bias in the iteration throught the heatbug$ |1 q; K7 Q* X+ J- ^
// list from timestep to timestep
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- c- {* H5 J1 F2 M/ Y( A: o: M // By default, all `createActionForEach' modelActions have: b6 a! o0 n/ I& o
// a default order of `Sequential', which means that the1 Q6 D; s4 A/ J" g3 d K8 o: b
// order of iteration through the `heatbugList' will be+ D" r9 G. ~$ c8 B6 h. o' t& D( v
// identical (assuming the list order is not changed
1 z! Q# ^1 a8 b // indirectly by some other process).
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, g+ k; G; I$ j modelActions = new ActionGroupImpl (getZone ());
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modelActions.createActionTo$message7 A3 j4 p- z. ]+ l I* b
(heat, new Selector (heat.getClass (), "stepRule", false));
8 X" P1 r; V9 G& h- C1 |$ p } catch (Exception e) {
' t! ^( h1 t+ Q1 m0 T: c7 l' y System.err.println ("Exception stepRule: " + e.getMessage ());
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try {( V) Y3 [5 a* s% o* W6 `# P6 h! u
Heatbug proto = (Heatbug) heatbugList.get (0);. N+ J. ^ O+ P% H, ~2 t/ Q5 N
Selector sel =
) p1 E+ D8 k5 S# s* p new Selector (proto.getClass (), "heatbugStep", false);
& c: \. Y9 }2 V) l actionForEach =
1 ~0 \ t: w2 ^ v6 H modelActions.createFActionForEachHomogeneous$call
2 w- G: L- b- [8 Q- w (heatbugList,
. R5 D: W: Y1 ` new FCallImpl (this, proto, sel,
7 m' x6 l& G. f# f$ l' o new FArgumentsImpl (this, sel)));6 T0 U$ |& X" z7 i4 z1 k0 p
} catch (Exception e) {7 V, B" ~, d" C; S
e.printStackTrace (System.err);; C0 m3 n- E V$ u6 ]! z5 E7 {
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/ \' }+ f. J$ `: b syncUpdateOrder ();
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try {
1 j0 u- v" |+ M/ M1 ~$ _- j modelActions.createActionTo$message & R9 R& L% o m, Z1 e
(heat, new Selector (heat.getClass (), "updateLattice", false));
, J4 S$ f6 n7 j. |$ ~' ]3 R. N } catch (Exception e) {
, p' i0 U, G/ A5 e1 _ System.err.println("Exception updateLattice: " + e.getMessage ());
6 g2 O6 K& A7 d }
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// Then we create a schedule that executes the
8 S6 y4 B2 _: R1 V) m6 p // modelActions. modelActions is an ActionGroup, by itself it/ X* v- @# ]+ Y7 ]2 v1 k7 ~4 M( N
// has no notion of time. In order to have it executed in
$ K% H/ k1 p- S. D) ` // time, we create a Schedule that says to use the" X! Y$ p8 E( S8 i8 B) |
// modelActions ActionGroup at particular times. This
, V8 l* S4 Y( s$ o2 `5 l. ^ // schedule has a repeat interval of 1, it will loop every4 M" l" P( m, ?% f! D
// time step. The action is executed at time 0 relative to2 G. M/ T' ~- E0 @1 @ [1 G" Z
// the beginning of the loop.( F/ T6 f2 Z+ ? c2 M( m+ L
- M1 a) }! D3 V: C // This is a simple schedule, with only one action that is0 V9 G) d2 M. S2 X. C7 t( f2 q
// just repeated every time. See jmousetrap for more# s' c+ K! S5 E% ~: J4 Z$ F+ X
// complicated schedules.) I: e5 ~; w3 I4 i
* ~( g0 h) L n/ a5 V. `/ R( Y; W modelSchedule = new ScheduleImpl (getZone (), 1);
- v2 s4 `2 ^ h8 n4 y modelSchedule.at$createAction (0, modelActions);
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return this;9 ?/ B. z: Y7 ]5 `' u+ H$ V6 p+ [# S
} |