OPC API 简介
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版权声明：本文为CSDN博主「lgbisha」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/lgbisha/article/details/82898228
1. 列举某Server下的所有OPC连接
ServerList serverList = new ServerList("10.1.5.123", "freud",
"password", "");
Collection<ClassDetails> classDetails = serverList
.listServersWithDetails(new Category[] {
Categories.OPCDAServer10, Categories.OPCDAServer20,
Categories.OPCDAServer30 }, new Category[] {});
for (ClassDetails cds : classDetails) {
System.out.println(cds.getProgId() + "=" + cds.getDescription());
}
2.列举连接下的所有Group和Item
public static void main(String[] args) throws Exception {
ConnectionInformation ci = new ConnectionInformation();
ci.setHost("10.1.5.123");
ci.setDomain("");
ci.setUser("freud");
ci.setPassword("password");
ci.setClsid("F8582CF2-88FB-11D0-B850-00C0F0104305");
Server server = new Server(ci, Executors.newSingleThreadScheduledExecutor());
server.connect();
dumpTree(server.getTreeBrowser().browse(), 0);
dumpFlat(server.getFlatBrowser());
server.disconnect();
}
private static void dumpFlat(final FlatBrowser browser)
throws IllegalArgumentException, UnknownHostException, JIException {
for (String name : browser.browse()) {
System.out.println(name);
}
}
private static void dumpTree(final Branch branch, final int level) {
for (final Leaf leaf : branch.getLeaves()) {
dumpLeaf(leaf, level);
}
for (final Branch subBranch : branch.getBranches()) {
dumpBranch(subBranch, level);
dumpTree(subBranch, level + 1);
}
}
private static String printTab(int level) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < level; i++) {
sb.append("\t");
}
return sb.toString();
}
private static void dumpLeaf(final Leaf leaf, final int level) {
System.out.println(printTab(level) + "Leaf: " + leaf.getName() + ":"
+ leaf.getItemId());
}
private static void dumpBranch(final Branch branch, final int level) {
System.out.println(printTab(level) + "Branch: " + branch.getName());
}
3.Item的同步查询
public static void main(String[] args) throws Exception {
ConnectionInformation ci = new ConnectionInformation();
ci.setHost("10.1.5.123");
ci.setDomain("");
ci.setUser("freud");
ci.setPassword("password");
ci.setClsid("F8582CF2-88FB-11D0-B850-00C0F0104305");
Server server = new Server(ci,
Executors.newSingleThreadScheduledExecutor());
server.connect();
Group group = server.addGroup();
Item item = group.addItem("Random.Real5");
Map<String, Item> items = group.addItems("Random.Real1",
"Random.Real2", "Random.Real3", "Random.Real4");
dumpItem(item);
for (Entry<String, Item> temp : items.entrySet()) {
dumpItem(temp.getValue());
}
server.dispose();
}
private static void dumpItem(Item item) throws JIException {
System.out.println("[" + (++count) + "],ItemName:[" + item.getId()
+ "],value:" + item.read(false).getValue());
}
private static int count;
4.Item的异步查询
private static final int PERIOD = 100;
private static final int SLEEP = 2000;
public static void main(String[] args) throws Exception {
ConnectionInformation ci = new ConnectionInformation();
ci.setHost("10.1.5.123");
ci.setDomain("");
ci.setUser("freud");
ci.setPassword("password");
ci.setClsid("F8582CF2-88FB-11D0-B850-00C0F0104305");
Server server = new Server(ci,
Executors.newSingleThreadScheduledExecutor());
server.connect();
AccessBase access = new SyncAccess(server, PERIOD);
access.addItem("Random.Real5", new DataCallback() {
private int i;
public void changed(Item item, ItemState itemstate) {
System.out.println("[" + (++i) + "],ItemName:[" + item.getId()
+ "],value:" + itemstate.getValue());
}
});
access.bind();
Thread.sleep(SLEEP);
access.unbind();
server.dispose();
}
5.Item的发布订阅查询
private static final int PERIOD = 100;
private static final int SLEEP = 2000;
public static void main(String[] args) throws Exception {
ConnectionInformation ci = new ConnectionInformation();
ci.setHost("10.1.5.123");
ci.setDomain("");
ci.setUser("freud");
ci.setPassword("password");
ci.setClsid("F8582CF2-88FB-11D0-B850-00C0F0104305");
Server server = new Server(ci,
Executors.newSingleThreadScheduledExecutor());
server.connect();
AccessBase access = new Async20Access(server, PERIOD, false);
access.addItem("Random.Real5", new DataCallback() {
private int count;
public void changed(Item item, ItemState itemstate) {
System.out.println("[" + (++count) + "],ItemName:["
+ item.getId() + "],value:" + itemstate.getValue());
}
});
access.bind();
Thread.sleep(SLEEP);
access.unbind();
server.dispose();
}
6.自动重连Item异步读取
private static final int PERIOD = 100;
private static final int SLEEP = 2000;
public static void main(String[] args) throws Exception {
ConnectionInformation ci = new ConnectionInformation();
ci.setHost("10.1.5.123");
ci.setDomain("");
ci.setUser("freud");
ci.setPassword("password");
ci.setClsid("F8582CF2-88FB-11D0-B850-00C0F0104305");
Server server = new Server(ci,
Executors.newSingleThreadScheduledExecutor());
AutoReconnectController controller = new AutoReconnectController(server);
controller.connect();
AccessBase access = new SyncAccess(server, PERIOD);
access.addItem("Random.Real5", new DataCallback() {
private int i;
public void changed(Item item, ItemState itemstate) {
System.out.println("[" + (++i) + "],ItemName:[" + item.getId()
+ "],value:" + itemstate.getValue());
}
});
access.bind();
Thread.sleep(SLEEP);
access.unbind();
controller.disconnect();
}
7.Item同步写入
public static void main(String[] args) throws Exception {
ConnectionInformation ci = new ConnectionInformation();
ci.setHost("10.1.5.123");
ci.setDomain("");
ci.setUser("freud");
ci.setPassword("password");
ci.setClsid("F8582CF2-88FB-11D0-B850-00C0F0104305");
Server server = new Server(ci,
Executors.newSingleThreadScheduledExecutor());
server.connect();
Group group = server.addGroup();
Item item = group.addItem("Square Waves.Real4");
final Float[] integerData = new Float[] { 1202f, 1203f, 1204f };
final JIArray array = new JIArray(integerData, false);
final JIVariant value = new JIVariant(array);
item.write(value);
Thread.sleep(2000);
dumpItem(item);
server.dispose();
}
private static void dumpItem(Item item) throws JIException {
System.out.println("[" + (++count) + "],ItemName:[" + item.getId()
+ "],value:" + item.read(true).getValue());
}
private static int count;
8.Item异步写入
