Jenna: Yes, there is an important exception according to Title 21 to US Code section 879. Search warrants involving controlled substance can be served at anytime. In addition to controlled substance warrants, agents can get special night time permission to execute other kinds of warrants. They must show the court reasonable cause for being allowed to do so. So for example agents might have facts showing that a night time entry will ether prevent destruction of the evidence they are looking for or reduce the chance that the suspect will injure officers. Also, in some investigations like, illegal gambling, human trafficking, or prostitution, night time might be the only time the officers are likely to find the evidence they are looking for at that location.
I must have foolishly chosen "Merge" when asked. The problem is that when U turn off "iCloud Music Library", all my private songs disappear. Only the purchases from iTunes Store remain. All my private songs have been uploaded to this "iCloud Music Library". I need to turn the library back to see them again.
Ti Private Show Mp3
See the attached screen shot. The missing file is An Tull. It is greyed out in my library, and the Get Info dialog box says it is in iCloud. The Finder shows all of the tracks except this one. I added it back in 2003, but it was "updated" in 2015 shortly after I joined the Apple Music trial.
I actually found that it DOES change the private songs that you add to your library. I ripped the Adele 25 cd(which isn't even on apple music btw) and added it to my library. Once I decided to merge the icloud with my itunes library, the album was replaced with one full of piano covers by Victoria Adelene. So frustrating...
After a look around, I realized that my original private music (= things I imported from CDs) are still on my MacBook in the iTunes library on disk (/Users/albert/Music/iTunes/iTunes\ Media/Music). So that is good.
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As Figure 1 below shows, message passing and remote method invocation systems usually sequester data structures behind a centralized manager process; therefore, any process that wants to manipulate the structures will have to wait its turn and ask the manager to perform the operation on its behalf. In other words, multiple processes can't truly access a data structure simultaneously in these conventional systems.
Channels turn out to be very versatile data structures, and can be used to achieve a variety of communication patterns in JavaSpaces programs (refer to Chapter 5 of JavaSpaces Principles, Patterns, and Practice for more details). In the rest of this article, I'll walk step-by-step through the details of implementing one kind of channel distributed data structure, and show you how it is central to a real-world program -- a distributed MP3 encoding application. Before diving down into the details, I'll give an overview of the application we'll be building.
You might imagine submitting your wav files to a high-powered, net-connected MP3 encoding service that would perform the wav-to-MP3 encoding for you and return the MP3 data. If many users simultaneously send encoding requests to a single MP3 encoder, the requests would need to queue up until they could be serviced. However, since the encoding tasks are completely independent of each other, they lend themselves well to being serviced in parallel by a farm of MP3 encoders. By using a space, you can easily build a distributed MP3-encoding application; Figure 3 shows the architecture of the system.
public class ChannelCreator private JavaSpace space; public static void main(String[] args) ChannelCreator creator = new ChannelCreator(); creator.createChannel(args[0]); private void createChannel(String channelName) space = SpaceAccessor.getSpace(); Index head = new Index("head", channelName, new Integer(1)); Index tail = new Index("tail", channelName, new Integer(0)); System.out.println("Creating new channel " + channelName); try space.write(head, null, Lease.FOREVER); space.write(tail, null, Lease.FOREVER); catch (Exception e) System.out.println("Error creating the channel."); e.printStackTrace(); return; System.out.println("Channel " + channelName + " created.");
Once a channel exists, you are free to add requests to it. In order to add MP3 encoding requests to your MP3 Request channel, you run an MP3Requester applet, whose interface is shown in Figure 4. To request MP3 encodings, you must fill in the topmost text field with a unique name that identifies yourself (you can use your email address, for example); this name will be used to identify your requests and results. You must also fill in the text field that asks for an absolute filename (say, C:\Windows\Desktop\wavs\drpepper.wav) that you'd like to have encoded. Then you're ready to click on the Encode It! button, which causes the MP3Requester to append the request to the MP3 Request channel.
public class MP3Requester extends Applet implements ActionListener, Runnable private JavaSpace space; private Thread resultTaker; private String from; // unique name for person requesting MP3s . . . variables for user interface components public void init() space = SpaceAccessor.getSpace(); // spawn thread to handle collecting & displaying results if (resultTaker == null) resultTaker = new Thread(this); resultTaker.start(); . . . user interface setup // "Encode It!" button pressed public void actionPerformed(ActionEvent event) from = userTextField.getText(); String inputName = fileTextField.getText(); . . . // we'll package the file's raw data in the entry byte[] rawData = null; rawData = Utils.getRawData(inputName); // open file & read bytes // append an MP3 request to the channel if (rawData != null) append("MP3 Request", inputName, rawData, from); . . . append method goes here // thread that loops, taking & displaying MP3 results public void run() . . .
private Integer getRequestNumber(String channel) try Index template = new Index("tail", channel); Index tail = (Index) space.take(template, null, Long.MAX_VALUE); tail.increment(); space.write(tail, null, Lease.FOREVER); return tail.getPosition(); catch (Exception e) e.printStackTrace(); return null;
private void append(String channel, String inputName, byte[] rawData, String from) Integer num = getRequestNumber(channel); MP3Request request = new MP3Request(channel, num, inputName, rawData, from); try space.write(request, null, Lease.FOREVER); catch (Exception e) e.printStackTrace(); return;
public class MP3Worker private JavaSpace space; private String channel; public static void main(String[] args) MP3Worker worker = new MP3Worker(); worker.startWork(); public void startWork() space = SpaceAccessor.getSpace(); channel = "MP3 Request"; while(true) processNextRequest(); . . . other method definitions
private void processNextRequest() Index tail = readIndex("tail", channel); Index head = removeIndex("head", channel); if (tail.position.intValue() // there are no requests writeIndex(head); return; // get the next request & increment the head: MP3Request request = removeRequest(channel, head.position); head.increment(); writeIndex(head); if (request == null) System.out.println("Communication error."); return; // retrieved an MP3 request, so call third-party freeware // program to perform the conversion from WAV to MP3 String inputName = request.inputName; byte[] inputData = request.data; byte[] outputData = null; String tmpInputFile = "./tmp" + request.position + ".wav"; String tmpOutputFile = "./tmp" + request.position + ".mp3"; Process subProcess = null; Utils.putRawData(inputData, tmpInputFile); try String[] cmdArray = "\"C:\\Program Files\\BladeEnc\\BladeEnc\"", "-quit", "-quiet", "-progress=0", tmpInputFile, tmpOutputFile; subProcess = Runtime.getRuntime().exec(cmdArray); subProcess.waitFor(); catch (Exception e) . . . return; . . . // put MP3 result into the space outputData = Utils.getRawData(tmpOutputFile); MP3Result result = new MP3Result(inputName, outputData, from); try space.write(result, null, Lease.FOREVER); . . . catch (Exception e) . . . return;
// remove a request entry from the channel private MP3Request removeRequest(String channel, Integer position) MP3Request template = new MP3Request (channel, position); MP3Request request = null; try request = (MP3Request) space.take(template, null, Long.MAX_VALUE); return request; catch (Exception e) e.printStackTrace(); return null; // remove an index ("head" or "tail") from the channel private Index removeIndex(String type, String channel) Index template = new Index(type, channel); Index index = null; try return (Index)space.take(template, null, Long.MAX_VALUE); catch (Exception e) e.printStackTrace(); return null; // read an index ("head" or "tail") from the channel private Index readIndex(String type, String channel) Index template = new Index(type, channel); Index index = null; try return (Index)space.read(template, null, Long.MAX_VALUE); catch (Exception e) e.printStackTrace(); return null; // write a head or tail index to the channel private void writeIndex(Index index) try space.write(index, null, Lease.FOREVER); catch (Exception e) e.printStackTrace(); 2ff7e9595c
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