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mvnd --status to display memory usage apache#129
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32 changes: 32 additions & 0 deletions
32
client/src/test/java/org/jboss/fuse/mvnd/client/OsUtilsTest.java
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| /* | ||
| * Copyright 2019 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.jboss.fuse.mvnd.client; | ||
|
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| import org.assertj.core.api.Assertions; | ||
| import org.jboss.fuse.mvnd.common.OsUtils; | ||
| import org.junit.jupiter.api.Test; | ||
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| public class OsUtilsTest { | ||
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| /** | ||
| * This test needs to be in the client module as long as the common module is on Java 8 | ||
| */ | ||
| @Test | ||
| void findProcessRssInKb() { | ||
| long rss = OsUtils.findProcessRssInKb(ProcessHandle.current().pid()); | ||
| Assertions.assertThat(rss).isGreaterThanOrEqualTo(0); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,61 @@ | ||
| /* | ||
| * Copyright 2019 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.jboss.fuse.mvnd.common; | ||
|
|
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| import java.util.Locale; | ||
|
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| public enum Os { | ||
| LINUX(true), | ||
| MAC(true), | ||
| WINDOWS(false), | ||
| UNKNOWN(false) { | ||
|
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| @Override | ||
| public boolean isUnixLike() { | ||
| throw new UnsupportedOperationException("Cannot tell isUnixLike() for an " + UNKNOWN.name() + " OS"); | ||
| } | ||
|
|
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| }; | ||
|
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| private static final Os CURRENT; | ||
| static { | ||
| final String osName = System.getProperty("os.name").toLowerCase(Locale.ROOT); | ||
| if (osName.startsWith("osx") || osName.startsWith("mac os x")) { | ||
| CURRENT = MAC; | ||
| } else if (osName.contains("win")) { | ||
| CURRENT = WINDOWS; | ||
| } else if (osName.contains("linux")) { | ||
| CURRENT = LINUX; | ||
| } else { | ||
| CURRENT = UNKNOWN; | ||
| } | ||
| } | ||
|
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| private final boolean unixLike; | ||
|
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| public static Os current() { | ||
| return CURRENT; | ||
| } | ||
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| Os(boolean unixLike) { | ||
| this.unixLike = unixLike; | ||
| } | ||
|
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| public boolean isUnixLike() { | ||
| return unixLike; | ||
| } | ||
|
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| } |
187 changes: 187 additions & 0 deletions
187
common/src/main/java/org/jboss/fuse/mvnd/common/OsUtils.java
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|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| /* | ||
| * Copyright 2019 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.jboss.fuse.mvnd.common; | ||
|
|
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| import java.io.BufferedReader; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.function.Consumer; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.Stream; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
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| public class OsUtils { | ||
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| private static final Logger LOGGER = LoggerFactory.getLogger(OsUtils.class); | ||
| private static final long KB = 1024; | ||
| private static final String UNITS = "kmgt"; | ||
|
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| private OsUtils() { | ||
|
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| } | ||
|
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| public static String kbTohumanReadable(long kb) { | ||
| int unit = 0; | ||
| while (kb >= KB && unit < UNITS.length() - 1) { | ||
| kb /= KB; | ||
| unit++; | ||
| } | ||
| String kbString = String.valueOf(kb); | ||
| return new StringBuilder(kbString.length() + 1).append(kbString).append(UNITS.charAt(unit)).toString(); | ||
| } | ||
|
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| public static long findProcessRssInKb(long pid) { | ||
| final Os os = Os.current(); | ||
| if (os.isUnixLike()) { | ||
| String[] cmd = { "ps", "-o", "rss=", "-p", String.valueOf(pid) }; | ||
| final List<String> output = new ArrayList<String>(1); | ||
| exec(cmd, output); | ||
| if (output.size() == 1) { | ||
| return Long.parseLong(output.get(0)); | ||
| } else { | ||
| LOGGER.warn("Unexpected output of " + Stream.of(cmd).collect(Collectors.joining(" ")) + ":\n" | ||
| + output.stream().collect(Collectors.joining("\n"))); | ||
| } | ||
| return -1; | ||
| } else if (os == Os.WINDOWS) { | ||
| String[] cmd = { "wmic", "process", "where", "processid=" + pid, "get", "WorkingSetSize" }; | ||
| final List<String> output = new ArrayList<String>(1); | ||
| exec(cmd, output); | ||
| final List<String> nonEmptyLines = output.stream().filter(l -> !l.isEmpty()).collect(Collectors.toList()); | ||
| if (nonEmptyLines.size() >= 2) { | ||
| try { | ||
| return Long.parseLong(nonEmptyLines.get(1).trim()); | ||
| } catch (NumberFormatException e) { | ||
| LOGGER.warn("Could not parse the second line of " + Stream.of(cmd).collect(Collectors.joining(" ")) | ||
| + " output as a long:\n" | ||
| + nonEmptyLines.stream().collect(Collectors.joining("\n"))); | ||
| } | ||
| } else { | ||
| LOGGER.warn("Unexpected output of " + Stream.of(cmd).collect(Collectors.joining(" ")) + ":\n" | ||
| + output.stream().collect(Collectors.joining("\n"))); | ||
| } | ||
| return -1; | ||
| } else { | ||
| return -1; | ||
| } | ||
| } | ||
|
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| private static void exec(String[] cmd, final List<String> output) { | ||
| final ProcessBuilder builder = new ProcessBuilder(cmd).redirectErrorStream(true); | ||
| try (CommandProcess ps = new CommandProcess(builder.start(), output::add)) { | ||
| final int exitCode = ps.waitFor(1000); | ||
| if (exitCode != 0) { | ||
| LOGGER.warn(Stream.of(cmd).collect(Collectors.joining(" ")) + " exited with " + exitCode + ":\n" | ||
| + output.stream().collect(Collectors.joining("\n"))); | ||
| } | ||
| } catch (IOException e) { | ||
| LOGGER.warn("Could not execute " + Stream.of(cmd).collect(Collectors.joining(" "))); | ||
| } catch (InterruptedException e) { | ||
| Thread.currentThread().interrupt(); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * A simple wrapper over {@link Process} that manages its destroying and offers Java 8-like | ||
| * {@link #waitFor(long, TimeUnit, String[])} with timeout. | ||
| */ | ||
| public static class CommandProcess implements AutoCloseable { | ||
| public static final int TIMEOUT_EXIT_CODE = Integer.MIN_VALUE + 42; | ||
|
|
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| /** | ||
| * The usual friend of {@link Process#getInputStream()} / {@link Process#getErrorStream()}. | ||
| */ | ||
| static class StreamGobbler extends Thread { | ||
| private volatile boolean cancelled; | ||
| private IOException exception; | ||
| private final InputStream in; | ||
| private final Consumer<String> out; | ||
|
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| private StreamGobbler(InputStream in, Consumer<String> out) { | ||
| this.in = in; | ||
| this.out = out; | ||
| } | ||
|
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| public void assertSuccess() throws IOException { | ||
| if (exception != null) { | ||
| throw exception; | ||
| } | ||
| } | ||
|
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| public void cancel() { | ||
| this.cancelled = true; | ||
| } | ||
|
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| @Override | ||
| public void run() { | ||
| try (BufferedReader r = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8))) { | ||
| String line; | ||
| while (!cancelled && (line = r.readLine()) != null) { | ||
| out.accept(line); | ||
| } | ||
| } catch (IOException e) { | ||
| exception = e; | ||
| } | ||
| } | ||
| } | ||
|
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| private final Process process; | ||
| private final Thread shutDownHook; | ||
| private final StreamGobbler stdOut; | ||
|
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| public CommandProcess(Process process, Consumer<String> outputConsumer) { | ||
| super(); | ||
| this.process = process; | ||
| this.stdOut = new StreamGobbler(process.getInputStream(), outputConsumer); | ||
| stdOut.start(); | ||
|
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| this.shutDownHook = new Thread(new Runnable() { | ||
| @Override | ||
| public void run() { | ||
| stdOut.cancel(); | ||
| CommandProcess.this.process.destroy(); | ||
| } | ||
| }); | ||
| Runtime.getRuntime().addShutdownHook(shutDownHook); | ||
| } | ||
|
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| @Override | ||
| public void close() { | ||
| process.destroy(); | ||
| } | ||
|
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| public int waitFor(long timeoutMs) throws InterruptedException, IOException { | ||
| final long deadline = System.currentTimeMillis() + timeoutMs; | ||
| final boolean timeouted = !process.waitFor(timeoutMs, TimeUnit.MILLISECONDS); | ||
| timeoutMs = Math.max(0, deadline - System.currentTimeMillis()); | ||
| stdOut.join(timeoutMs); | ||
| stdOut.assertSuccess(); | ||
| try { | ||
| Runtime.getRuntime().removeShutdownHook(shutDownHook); | ||
| } catch (Exception ignored) { | ||
| } | ||
| final int exitCode = timeouted ? TIMEOUT_EXIT_CODE : process.exitValue(); | ||
| return exitCode; | ||
| } | ||
|
|
||
| } | ||
| } |
32 changes: 32 additions & 0 deletions
32
common/src/test/java/org/jboss/fuse/mvnd/common/OsUtilsTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| /* | ||
| * Copyright 2019 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.jboss.fuse.mvnd.common; | ||
|
|
||
| import org.junit.jupiter.api.Assertions; | ||
| import org.junit.jupiter.api.Test; | ||
|
|
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| public class OsUtilsTest { | ||
| @Test | ||
| void kbTohumanReadable() { | ||
| Assertions.assertEquals("0k", OsUtils.kbTohumanReadable(0)); | ||
| Assertions.assertEquals("1001k", OsUtils.kbTohumanReadable(1001)); | ||
| Assertions.assertEquals("1m", OsUtils.kbTohumanReadable(1024)); | ||
| Assertions.assertEquals("1023m", OsUtils.kbTohumanReadable(1024 * 1024 - 1)); | ||
| Assertions.assertEquals("1g", OsUtils.kbTohumanReadable(1024 * 1024)); | ||
| Assertions.assertEquals("1t", OsUtils.kbTohumanReadable(1024 * 1024 * 1024)); | ||
| } | ||
|
|
||
| } |
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