Here is an example of a dataflow action that takes a shared build service and a file path as parameters:

====
[source.multi-language-sample,java]
.SoundPlay.java
----
include::{snippetsPath}/dataflowActions/playSound/groovy/plugin/src/main/java/org/gradle/sample/sound/SoundPlay.java[]
----
====

		s6b.Grow(s6b.Size() + n)
		s6b.SetSize(s6b.Size() + n)
		size += n
	}

	if size > 0 {
		linkoff = Rnd(int64(uint64(HEADR)+Segtext.Length), *FlagRound) + Rnd(int64(Segrelrodata.Filelen), *FlagRound) + Rnd(int64(Segdata.Filelen), *FlagRound) + Rnd(int64(Segdwarf.Filelen), *FlagRound)
		ctxt.Out.SeekSet(linkoff)

		ctxt.Out.Write(ldr.Data(s1))
		ctxt.Out.Write(ldr.Data(s2))
		ctxt.Out.Write(ldr.Data(s3))

	// Kernel requires all loaded segments to be page-aligned in the file,
	// even though we mark this one as being 0 bytes of virtual address space.
	dwarfstart := Rnd(int64(linkseg.Offset), *FlagRound)
	if _, err := outf.Seek(dwarfstart, 0); err != nil {
		return err
	}

	if _, err := dwarff.Seek(int64(realdwarf.Offset), 0); err != nil {
		return err
	}

		unlock(&sched.lock) // unlock so that GODEBUG=scheddetail=1 doesn't hang
		fatal("no goroutines (main called runtime.Goexit) - deadlock!")
	}

	// Maybe jump time forward for playground.
	if faketime != 0 {
		if when := timeSleepUntil(); when < maxWhen {
			faketime = when

			// Start an M to steal the timer.
			pp, _ := pidleget(faketime)
			if pp == nil {

				// should ensure that this segment's
				// VA ≡ Fileoff mod FlagRound.
				seg.Fileoff = uint64(Rnd(int64(prev.Fileoff+prev.Filelen), *FlagRound))
				if seg.Vaddr%uint64(*FlagRound) != seg.Fileoff%uint64(*FlagRound) {
					Exitf("bad segment rounding (Vaddr=%#x Fileoff=%#x FlagRound=%#x)", seg.Vaddr, seg.Fileoff, *FlagRound)
				}
			case objabi.Hwindows:

	xfile.dynLibraries = make(map[string]int)

	HEADR = int32(Rnd(XCOFFHDRRESERVE, XCOFFSECTALIGN))
	if *FlagRound != -1 {
		Errorf(nil, "-R not available on AIX")
	}
	*FlagRound = XCOFFSECTALIGN
	if *FlagTextAddr != -1 {
		Errorf(nil, "-T not available on AIX")
	}
	*FlagTextAddr = Rnd(XCOFFTEXTBASE, *FlagRound) + int64(HEADR)
}

// SYMBOL TABLE

// type records C_FILE information needed for genasmsym in XCOFF.

			ctxt.loader.SetAttrSpecial(sb.Sym(), true)
			ctxt.loader.SetAttrLocal(sb.Sym(), true)
		}
	}

	HEADR = PEFILEHEADR
	if *FlagRound == -1 {
		*FlagRound = PESECTALIGN
	}
	if *FlagTextAddr == -1 {
		*FlagTextAddr = Rnd(PEBASE, *FlagRound) + int64(PESECTHEADR)
	}
}

func pewrite(ctxt *Link) {
	ctxt.Out.SeekSet(0)
	if ctxt.LinkMode != LinkExternal {
		ctxt.Out.Write(dosstub)

	ph.Filesz = seg.Filelen
	ph.Align = uint64(*FlagRound)

	return ph
}

func elfphrelro(seg *sym.Segment) {
	ph := newElfPhdr()
	ph.Type = elf.PT_GNU_RELRO
	ph.Flags = elf.PF_R
	ph.Vaddr = seg.Vaddr
	ph.Paddr = seg.Vaddr
	ph.Memsz = seg.Length
	ph.Off = seg.Fileoff
	ph.Filesz = seg.Filelen
	ph.Align = uint64(*FlagRound)
}

func elfshname(name string) *ElfShdr {

1F6D8..1F6DB  ; disallowed                             # NA   <reserved-1F6D8>..<reserved-1F6DB>
1F6DC         ; valid                  ;      ; NV8    # 15.0 WIRELESS
1F6DD..1F6DF  ; valid                  ;      ; NV8    # 14.0 PLAYGROUND SLIDE..RING BUOY
1F6E0..1F6EC  ; valid                  ;      ; NV8    # 7.0  HAMMER AND WRENCH..AIRPLANE ARRIVING
1F6ED..1F6EF  ; disallowed                             # NA   <reserved-1F6ED>..<reserved-1F6EF>